Right now I have
50mm f1.8 (slightly broken)
50mm macro 2.5 (also slightly broken)
I want to get the 24-70mm 2.8L next, then a 50mm 1.4 (or a 50mm L if they ever make one.) I'd also want the 85mm 1.2L but I heard it's slow (although I'd use it for studio work anyway) and the 35mm 1.4L.
A really nice lens I'd like to have is the 200mm 1.8L although I don't think I'd be buying one any time soon (unless canon released a new updated model, I don't want to spend all that money on a used lens although they do seem to be pretty sweet.)
Slightly broken you wanting an excuse to upgrade