1. There ARE a lot of asians, and I don't know why this is. Well, there are a lot of asians IN GENERAL. It also depends on the major. The sciences and different engineering majors have coincidentally higher numbers. There is no reason why someone should NOT choose Davis because of the high amount of asian students. Before even hearing about Davis, I had been unusually actually attracted to asian boys :) (Depends.) But that is no reason to choose a college, either. And it just so happens that my bf now is NOT asian. Well half Philipino. Anyway.
2. Classes are as stressful as you make them! Honestly, plan ahead and do your work. That's it. Just because it is "UC Davis" does not mean that there is EXTRA pressure to do well. This isn't Berkeley! (Just Kidding!) Honestly, there should already be pressure from yourself, otherwise you wouldn't have the motivation to even apply and attend Davis in the first place. But basically, don't freak out and become addicted to coffee and red bull. You will find what you like, whether you stick with your Aeronautical Engineering major or switch to Linguistics! Haha..
3. Part uno: I could have done better my freshman year, and YOU HAVE THAT CHANCE! I am absolutely not uptight. I am the one to calm my friends down when they freak out. If you're not getting the grades you want, change your habits. If you aren't getting the grades your parents want, that's another issue.........
Part dos: I LOVE to party. Not only are you meeting new people, learning about interactions between them and trying new things, you're experiencing other people's values through intensive situational dealings. If there's a line for the bathroom, I usually make three to four new friends. What about line to the keg!? A little flirting never hurt! You get what you want faster, (hopefully you're not a skeez about it!) and in the mean time, people admire your conversational skills! FUN STUFFFFFFF. Maybe I'll see you at a party ot two next quarter? :)
4. I do not know ANY Agg majors. Well, except for the boys in the Agg frat. And I hate the smell of cow poop. Don't get me wrong, I'll pet the animals, but that's all they'll get from me. I'm about to contradict myself. It's funny; one day I took a three minute long video of the cows coming up to me at the fence and MOOING extremely loud. They are adorable. OK ok, you get used to them. But you can absolutely avoid them if you must :)
You will have to find out for yourself. All I can say is that the people in Davis are friendly and fun, and you can find what you're looking for if you really want it!