(UPDATE-9/2/11: I am now in the process of uploading a lot of videos from my library, practically all of the ones I feel are worth uploading, including many that I've had up in the past but took down at some point. Be patient, and you'll find a lot of new videos here in the coming weeks and months.)
Basically, I just post whatever I feel like posting. I generally don't take requests, especially when I am not asked politely.
I also don't appreciate it when people take videos from my channels, past or present, and then post them to their own channels without any credit for me. (For the record, I wouldn't mind it very much if someone were to ask my permission to repost old videos of mine and give me credit for it...)