Students at Vandy are happy for many reasons. Nashville is a nice place to go to school, it is affordable, easy to get around, Vandy is close to good bars, great music, near downtown but in its own collegiate area. Everyone in the south is nice, so it is really pleasant to do your chores. (Plus Vandy undergrads will do your chores for free to you,they get paid by Vandy). The school is unbelievably supportive of its medical students. They make you feel wanted and nurtured. You may not think that is important, but med school is not like undergrad. You work so much harder, and at Vandy the administrators and teachers really care about you. They feed you, clothe you (OK, just scrubs and a white coat) and attend to your psychic needs.
The student body is brilliant. Most everyone was accepted to the ivys, to UCLA, to WashU etc, but turned them down to go to a school where you are nurtured, where kids are not super competitive (tho all study a lot) but where everyone helps out. It is one big family in many ways. In the first year class, the most kids from any undergrad campus was Vandy, followed by Harvard, then maybe WashU. Which is not to say that the kids from the state universities are not brilliant, they are. And all are nice. The curriculum will undergo a change next year and should cut down the number of hours in class, but if classtime is productive, it forces you to learn and not slack off, so it is OK. I turned down a bunch of schools "ranked higher" to go to Vandy and I didn't make a mistake (so Far). 'The match list is great, and you are going to a school that is supportive and that has students who are social and kind. Come back for second look weekend and you will see the difference. That is what sold me. Before all the second look programs, I thought I was going somewhere else. But when I really looked at what my life would be like, I picked Vandy.
One other difference with Vandy and most other schools. Part of the curriculum is the Emphasis Program where you pick a prof and do research in first year and the summer after, so as an official part of the program all students have research experience. At other schools (Duke being a major exception), research is not part of the curriculum and you have to search it out and it is really hard to have time if it is not part of the curriculum and the profs know that they need to bend to first and second year students' needs. One other example of how Vandy cares for its med students.
Good luck with your decisions. There is nothing like your first acceptance to take the pressure off!!