Has anybody else tried?

There's this thing called stumbleupon.com where you register your interests and they randomly show you websites related to those interests. You give each one they show you a thumbs up or down and then supposedly over time they refine their list so what they show you more closely matches your interest list. I've tried it and come across some very interesting sites I probably would not have found otherwise. However, I am interested in ART HISTORY and they keep showing me modern art sites. As yet they have not figured out that I can't stand most modern art. Anybody else tried it???