San Diego is where its at! LA is over priced, waaaaaay over crowded and full of dumbass rich fucks! Now, i know LA has some great offers, but for me, its miserable. I've lived in San Diego my whole life, and its great, although it is getting crowded too. North County San Diego is where its at, and is where i live. If you live a simple, minimal lifestyle its easy to make rent. I pay $700 for a small 450sq.ft. studio. Its 30-mins from the beach. The deals are out there, keep searching and you will find what your looking for. Plenty to ride, and not crazy expensive depending the the job you have. Although the closer to the coast, the more your going to pay. There is a great BMX community here, a lot of pro riders live here as well. Good skateparks, and some awesome trail spots, plenty of collage pussy too. If your into riding MTB its got some great spots as well.
Overall i wouldn't mess with LA. Riverside/San Bernardino is okay, but hot and haggard.
It all depends on where you can find a place to live. I can tell you right now, any place in California, is gona be better then where your at now. Make the move, see what happens, you can always go back to what you know.