What type of sites you build and also what niches you are going to promote?

Thinking back I realized when i started out i basically went for the niches and styles of site that were popular at the time, guess that was pretty much hit or miss for the first year or so until i realized i needed to concenrate my efforts not on what everyone else was doing but on what i wanted to do.

How about the rest of you? Is there a method you use to choose niches you promote other than money?