Newbie,
Been there, done that, bought the T-Shirt!
I absolutely know what you are going through with the whole UC application and acceptance process. I have a theory going that despite what the admissions offices say, that they actually just pull names out of a hat for the acceptance list. But seriously, you got into two very amazing schools so be proud of yourself! If you want to PM me, I will tell you my crazy story about my experience applying the the UC system, that will make you feel ten times better about your own. Anyway, congratulations you have accomplished an amazing feat and I wish you even more luck with all of your other decisions.
P.S. I heard the TriDelts at UCI and Davis are awesome!