A few that I hate:
This pyramid house near my grandparent's place outside of Las Vegas:
Streetview link:
And closer to home is this poor house in Woods Cross, UT. It looks like it got the way that it is through at least 20 different ill-conceived, do-it-yourself expansions:
Streetview Link:
I think it may be a polygamist's home. There are a few of them scattered around northern Utah and they tend to live in enormous, odd looking homes that they build themselves.