It's funny, because I'm sure I visit 90% of the sections on PC, be it lurking or posting, but I can never entirely put my finger on where I am most. I'd take a wild guess and say that it's Other Entertainment. I do spend a lot of time in Graphics and Photography, which might be a given, but with the same token I do tend to move around a bit. Some of my favourite sections on PC aren't active enough to hold my attention for too long. I guess you could say that I would spend more time in a section in which has longer and more constructive posts which I read. I spend more time actually reading other people's posts every day than I do posting for myself.
It's ironic that a few months ago I would have said something like "Other Trivia" and be one hundred percent sure on the matter, yet now, I'm unsure. I know when I started out I was primarily attached to OT as well as an odd one maybe; poetry. But, if you are to take sections as apposed to forums, Creative Discussions & technology & Media demand most of my activity, even though I move around quite a lot. With that said, I should be loyal to my sections and say I spend most time in those! Though I'm really unsure where the majority of my post count would lie in, but it's evenly spread I would imagine.