Congratulations on your acceptances! That's very exciting.
In no particular order, here are my five favorite things about Hopkins:
1) Research opportunities. You've probably heard on a campus visit/tour about how with a few emails, it's pretty easy for undergrads to find a research position on campus or at the School of Public Health or Medicine, but what I think isn't talked about as much to prospective students is how Hopkins has thousands of dollars in grant money available for students to pursue research outside of Hopkins labs. Obviously some students apply for grant money to do science research, but students have done some really incredible research in the humanities as well. Like check out this article: http://www.jhu.edu/news/home07/pura/kennedy.html
- a Hopkins student got to travel throughout Europe to study literature, and the university paid for it. This isn't like a hugely uncommon thing that just a few students get to do either - in 2008, there were like 50 students who received the Provost's Undergraduate Research Award (just one of the many grant/scholarship opportunities for undergrads), which is funding up to $2500 for research. So I guess the bottom line is that Hopkins wants its kids to learn outside of the classroom, and it does a tremendous job to ensure that that's possible for everyone.
2) The professors. That's a pretty broad topic, but the faculty here is incredible. Here's a good example: JHU_Joe and I had this physics professor for the first half of the semester who was such a cool guy with a great sense of humor. I always thought of him as the professor who occasionally shocked himself on his electricity demonstrations and made Anchorman references in class, but then Joe explained to me a couple of weeks ago that he does some of the most cutting-edge physics research in the entire world. (I don't remember exactly what his research was - something about proton collisions - maybe if Joe's reading he could explain it again because it was really cool :) ) Also, just last week I learned that my Spanish professor is the editor for some versions of Don Quijote that are distributed in public schools throughout Madrid. It's really awesome that even as freshmen, we get to take classes from professors that are so advanced in their fields.
3) When I was deciding on colleges, I really didn't put much weight on distance from home (as long as it was bearable car ride away), but now that I'm here, there are a lot of advantages to only being two-ish hours from home. It made move-in really easy. When I had tonsillitis, my Dad drove down here to go to the hospital with me. My sister is planning to come down to see a lacrosse game because it's only an hour train ride from 30th Street in Philly. Even though I'm perfectly content here at school, just knowing that I can hop on the train whenever to go home is comforting.
4) No core curriculum. This was super important for me in choosing a school - I didn't want my school telling me that there was anything I needed to take. At Hopkins, we have distribution requirements, which means that you need x amount of credits in the humanities, natural sciences, social sciences, etc along with the required classes that pertain to your major, but Hopkins isn't going to make you take math or history or chemistry if you absolutely hate it. Personally I'm not a fan of history, but here I never have to take a history course again. Some of my friends hate English class, so they're taking humanities classes in anything from philosophy to Italian to fulfill their humanities requirements. This freedom to take whatever I want is what's making it entirely possible for me to double major in two completely unrelated things.
5) Location. I'll admit that I'm not a huge fan of the direct surrounding area of Hopkins, but there is a free shuttle to the Inner Harbor, Towson, Peabody, the Medical Campus, Penn Station, and other places, so you have access to free transportation to pretty much anywhere you would need to go within like 15-20 minutes of here. The Inner Harbor has some great restaurants and is a neat place to walk around. My friends and I love spending weekends in Towson - there's a mall, a cinema, and a lot of good restaurants and cafes. The area around Peabody is really pretty and historic. The DC area is only a $7 train ride away, so students go there a lot for weekend trips just for fun or for concerts. Philadelphia is obviously a short ride away, and the school runs a few cheap trips to New York each semester, so there's always somewhere fun to get if you ever feel the need to get off campus.
My least favorite things:
1) I miss the food you can get in downtown Philly - especially the Italian food. There are a lot of good restaurants in Baltimore, but it's not like downtown Philadelphia where you can go to South Street or Reading Terminal Market and get some really good food for relatively cheap. I really don't have any big complaints about campus food - breakfast in the freshman dining hall is really good, and for lunch and dinner there are a ton of options in the dining halls and markets across campus, so there's definitely something for everyone.
2) I like that Greek life doesn't define the social life here, but there are I think 11 frats and only 3 sororities (we're getting a fourth next year) besides the multicultural and community services sororities and fraternities. I kind of wish that was a little more balanced.
3) As I mentioned before, Charles Village, the immediate area around Hopkins, isn't as much fun as the Inner Harbor or Towson, which are both short shuttle rides away. Charles Village is fantastic in terms of cafes to study in, grocery stores to get necessities, and affordable restaurants, but after seeing how pretty the area surrounding Peabody is, I'm a little jealous that Charles Village isn't quite as scenic.
4) Even though you're allowed to have a car here, there's no good place to park it. It would be nice to have a car so that I wouldn't have to pay for train tickets/ follow the shuttle schedule, but realistically even if I did have a parking spot, there's no way my mom would ever let me bring the car to Baltimore. I'm not the best driver.
5) This is a little unfair for me to say seeing that Baltimore had a really unusual amount of snowfall this year where there were like 3 feet of snow on the ground for like half of the month of February, but the school could have done a better job of salting the pathways. That sounds like a ridiculous complaint, but I can't think of another least favorite thing about this school, and I seriously slipped and fell five thousand times a day for like three weeks because the paths were just sheets of ice.
To answer your other question, it isn't hard to double major at all because there's no set of required courses you have to take here, and AP credits make it even easier. Having a double major I think keeps me more motivated because if I didn't have Spanish courses, I'd probably feel a little overwhelmed with all the science, and I don't think I'd enjoy it as much.
Let me know if there's anything else I can help with, and good luck with your decision making! :)