about four of my really good friends live down there and go to SD state/Mesa community. They all seem to like it. I think its not that far from mammoth for skiing and stuff, im sure they have a ski club and stuff too...
I've spent some time in SD and its a pretty cool place if you like the beach scene...It's pretty fun hanging out at the beaches and watching sexy chicks walk by all day. Downtown SD is kinda small but its pretty nice, gas light district is legit if your 21+.....Lots of cool blackhawk heli's and aircraft flying around since theres a large military presence in SD.
I'd never live there, just not my style. It feels too touristy....I'm sure theres a good college scene, but I havent spent much time around the school...