Well I don't think that I have to like the content to create sites. Our live stuff is all twink. 90% of the videos I sell are stuff that I don't care for. I just don't think my personal view plays much into it. It's more what does the public like, what sells, and what is going to make my clients, and my bank account PHAT.

I would say that working with content that you like is good for new webmasters. So they are excited about it, work harder to make sales, ect. Once your experienced with things like some of are, I don't think it matters if you sell what you like only, or sale anything with a price tag.