I like to stick around "Off Topic" these days mostly for the Clubs and Polls (and sometimes even "Other Chat").
I used to like "General Pokemon Discussion" but there comes a point where you can only say so much about the GBC/GBA games before you start repeating yourself, or at least thats what I find for myself.
I wander around the Gaming sections usually, and I've recently started posting in Other Chat forums but that section is basically a debate forum after I've been around there for a while... I don't like debates :\
I'm dedicated to Trade Corner. I have an insatiable desire to catch them all. xD
I stalk other forums once in a while, but TC is mostly where I post & run my shop.
Other Chat, OVP, and Culture and Media. I'm not really into pokemon so much anymore, at least not enough to get into big discussions about it so I stick to areas that interest me a bit more :)
Culture & Media... duh! Although I'd still be there even if I didn't mod it. I just love me some culture (and some media, to a lesser extent). After that, it's probably a toss-up between some Staff forums and OVP.