Nah, I do fine. However, at times I forget it's a more closed and serious question, and will still add it inside 'humor & jokes' but leave out my own sub-category. Hey... you never made a question inside it, did you?
I think the present categories are pretty good. Occasionally it might be difficult to find a perfect fit but there's always somewhere to place a question.
Then I'd feel I was back on ask.com where so many of the questions were about pregnancy (basically, "How can I tell if I'm pregnant" which was repeated ad nauseum).