If you value street fashion, nightlife, music, no driving, etc then the bay area isn't very appealing. I wouldn't move back west until I'm married with kids.
I'm 22, rent a huge apt with two friends for ~$900/m each, live on the main subway line (15 min to work). I couldn't spend more than $4k/m if I tried (bought a roomba, tom ford shades, eat steak and berries).