"But, as Paul notes, the easiest way to make something that people want is to make something that you want. Yahoo! started out as a directory of Jerry and Dave's favorite links. Movable Type was born out of Mena's need for a better way to talk about herself. Jonathan started Friendster to find a girlfriend. Zuckerberg started FaceBook to find a girlfriend. Joe and Alon started JDate to find Jewish girlfriends. Ted started Dogster to find his dog a date. If you build something you want, chances are pretty good that someone else will want it as well."
Well said! :)