i've been to NYC several times and it's actually so much fun. the only problem was the weird street vendor that threatened to beat me up for not buying his mixtape
but i also went to san francisco and it was great, too...it was summer and it was hot as hell in DC so when i got there it felt so nice to be in the cool weather. and we stayed in a nice hotel too. it was so nice i wanna go there again
but i'm not really interested in the rest of california outside of san francisco and overall NYC has given me more fun times (partially because i can go there more often) so i'll vote NY
edit: oh i forgot to mention, i had an 8 hour layover in LA and i went out into the city and it was terrible. >_> i don't want to go there again
California and there's no question about it. NYC is cute though I've been there as well but the rest of NY is unknown while California has multiple iconic cities.