www.baycon.org: San Mateo, CA
www.siliconventions.com: San Jose, CA
www.loscon.org: Los Angeles, CA
www.gallifreyone.com/gallifrey.php: Los Angeles, CA (only been once but plan to add it to my schedule)

www.westercon.org (when I can/when it's in CA)
www.worldcon.org (when I can/when it's in CA)

Wondercon, if you count that as a con.

Someday I'll make it to an out of state.

I do all the Arizona cons and occacional California ones.

TT

Arisia - www.arisia.com - Earth (Cambridge, MA)
Boskone - www.nesfa.org/boskone - Earth (Boston, MA)
Readercon - www.readercon.org - Earth (Burlington, MA)
Worldcon - www.wsfs.org - Earth (Yokohama then Denver then Montreal or Kansas City
Albacon - www.albacon.com - Earth (Albany, NY)
Gaylaxicon - www.gaylacticnetwork.org/ - Earth (Atlanta then D.C. then Minneapolis)

This year was a busy one for me, typically I just do four cons.

Farpoint, Hunt Valley, MD: www.bcpl.net/~wilsonr/
Wizard World Philadelphia: www.wizarduniverse.com/conven...hia.cfm
Shore-Leave, Hunt Valley, MD: www.shore-leave.com/
Dragon*Con, Atlanta, GA: www.dragoncon.org/

But this year I was able to fit in two more west coast cons.

WonderCon, San Francisco: www.comic-con.org/wc/
San Diego Comic-con: www.comic-con.org/

I haven't done much con-going this past year or so, mainly because I've been too busy working on organizing a con myself: www.templecon.org/ We are in our third year and getting bigger, requiring more of a time investment on my part - I'm still dithering over whether I can spare the time to go to Arisia this year (previously mentioned in this thread - I have gone there off and on since their second year). I have also been to Dragon Con (also previously mentioned), which was a ton of fun but a little overwhelming, especially since I went as a regular attendee rather than as a vendor or organizer, which is how I usually attend cons. Going as a fan instead of working the con, I had no idea what to do with myself!