see, I really want to ask questions, but somehow I feel like it would be arrogant to even imagine myself at HLS...
What the hell, I'm gonna ask questions!
How big does it feel?
Do you like your section? What are your classmates like?
What, to you, are the top 3 most awesome things about studying law at Harvard?
Hey, don't count yourself out! I was saying the same thing around this time last year. Like any other school, Harvard has its admissions gray areas, and plenty of us sneak across them every year.

Anyway, to answer your questions:
1) It doesn't feel *that* big to me, but I came from a huge state school — 1600 students is nothing. Even more than that, as a 1L your view of the HLS world can really feel limited to the 80 people in your section. But! This is not a bad thing! Apart from the student body, HLS really is a huge place — more stuff going on, etc., than you feel like you can manage during your first semester. Don't underestimate the social, mental, and academic utility of having as an anchor a group of people going through the very same horizon-expansion shouldn't be underestimated. Which leads into the second question:
2) My section is great! We don't have any real gunners, and improbably enough we all get along pretty well. To rebut the two stereotypes that you tend to hear about Harvard in general, the number of antisocial people I've met here (either due to hopeless elitism or hopless nerdism) has been surprisingly low. Cliques always form, yes, but I don't think there's anyone in my section who doesn't like it overall.
3) Let's see... From most to least specific, I'd say the oh-so-generous LIPP program (essentially subsidizes careers in public service), the availability of opportunities (I'm interested particularly in two fields, and the foremost people in each teach here), and the general coolness of the students (as above).