I talked about this a bit in stereotypes, but I'll elaborate. Everyone is pretty accepting, though it depends what definition of diverse you use to determine how "diverse" Colgate is. Unfortunately a stereotype that it's not scares off people that would potentially make it MORE diverse. A lot of cultural groups have presences greater than their constituent parts, which is good. I think most people could feel comfortable. Maybe except racists and homophobes, but I don't think anyone else would want them here either...
Most students are... normal. Jeans, t-shirts, coats. It's not something I pay attention to. Of course there's a few people that are concerned with being fashionable, but most people aren't. Having lots of different extracurriculars helps people from different groups interact. You'll see a lot of people participating in things because they're genuinely interested, regardless of any connotations of the activity.
Most students seem to be from the northeast, though they're trying to expand a lot and have students from almost every state. Even from the northeast, though, backgrounds differ a lot. I've had friends from estates in Westchester and Harlem, whose parents could pay for college 10 times over and whose parents can't pay a dime. I don't know if that's typical, but I hope it is.
Students seem aware but not too active, though there's several groups on campus that are very enthusiastic. Too many protests/political issues could be annoying - this way groups pick and choose the important problems that students care about. In general people seem to be moderate to left-leaning. There's some outspoken conservatives, but they seem to be in the minority. For some reason we have a reputation as being conservative, but I think that's just compared to colleges and universities known for being incredibly liberal (like Berkley).
I've never heard people talk about future earnings. People talk about what they dream of doing for the rest of their lives, what will make them happy. Bringing up salaries for seniors seems almost... not taboo, but you certainly don't brag about it.
People seem to all be really passionate about whatever they are interested in, regardless of the financial payoff. I'm sure there's students here who are only in college to get a prestigious degree to get a good job, but I don't think I actually know many. If anything, people joke about "living in a box" because they're pursuing what they love to do and it's not lucrative (like teaching for example).