A lot of SoCal guys in here, so what's the best beach in SoCal that you've been to... I usually go to Huntington because of the firepits...you can BBQ and/or have a bonfire...but because of this, this beach isn't as clean as the other ones (that's probably the biggest negative about Huntington)..
Huntington is my beach of choice. I love the bonfire pits for when I go with a crowd for special occassions. This summer I've been going there pretty much every Friday/Saturday, usually chill around towers 2 & 4, right next to the pier...lotsa times I'll be playing volleyball right next to the pier as well. Santa Monica didn't impress me when I went there last month. The promenade is really cool but the water was pretty gross from what I remember. Manhattan Beach has really shitty waves.
I tend to stick to a lot of the smaller beaches in Laguna, although I will occassionally do the bbq thing @ huntington... Moss, Aliso Creek, Salt Creek, and Thousand Steps are all real nice beaches in the laguna area...