As the title asks.
I look for good discussions, friendly and humourous members, a regular presence of the administrator and polite staff members.
What about you?
I look for an active, mature and sensible community. A forum where I can help to the best of my ability.
Intelligent people, primarily. Unfortunately, that means I'm usually looking a while...
posts, content, quality members, good staff/admin, topics of interest.
I look for a great forums, with some active & friendlly members and that supports you.
Active members and friendly moderaters and admins with forums rules for all to follow.
When I'm looking for a forum, I make sure the forum is nice and active, the staff is professional, and the users aren't stupid.
Just a sexy layout and a nice community.
Average
I hate when everyone tries to be perfect cough cough
I look for a non serious, comic forum, I don't want trolls though
and prankster staff, hehe
Basically, something like 4chan