I also go to the
[H]. When I do though, I mostly lurk around in the Cool Cases and OC&C. I occasionally go into GenMay, but usually just for entertainment value. (Some of the threads in there are fun to read

). Oh, and Digital Artwerk.. There is a lot of good info there. A lot of times I do some research when I'm thinking about getting a new HD or something, and go into whichever forum and search for what I'm looking for to see other people's experiences.
Why are forums so time consuming??? Maybe I just visit too many..
ProCooling
2CPU
[H]ard|OCP
3DBuzz
CGTalk
Not to mention a few others that I occasionally visit...