I have attended two anime conventions: one in Anaheim, CA and another in Long Beach, CA. This year's location for my area has been upgraded in size to take place in LA, so there is a pretty good chance that I will check it out this year, also.
I normally go to these conventions to check out possible anime production cel sales, not for cosplaying. I have some friends that get into it, and I do admire how it adds to the carnival feel of the event, but it is just not something for me.
How about yourself?