Sadatx,
I was born/raised/and I live in Los Angeles. The cool thing is that there is always something to do. You have beaches, mountains, clubs, bars, museums, theaters, sports arenas...everything. Beautiful weather too.
Of course it's not perfect. Unless you're relatively close to the coast, the air is so polluted you can slice it. Traffic jams are no joke...our nice freeways with the 65mph speed limits often get choked at 10mph during rush hour. Strangers on the street are not friendly like in many places...in fact they will often be adversarial, if anything.
If you are looking for excitement, you will not be disappointed. I've been here for almost 25 years and am ready for some calm, lol.