I am with Sir Alain, Blmbot is very nice as a source for fonts. Lots of really great comic-styles there for the Champions fans.
I generally use different fonts for different projects. The selection criteria isn't all that scientific. One of the fonts I really love for modern building interiors (which ironically is what I do most often despite the fact that I have not yet posted any) is Tekton Pro, which looks like Technical (but is slightly superior to it IMHO, especially since it is an OpenType font)