Let's see, Nintendo has tried every major North American sport save hockey and football. And I agree with the majority of you, I enjoyed them more than the sims. This is mainly because I watch those sports, but I don't really care for them. Foootball, basketball, baseball? Nah, I just don't really love those sports. So the Mario series were more enjoyable for me.
However, I love hockey, and I wish Nintendo would try a hockey game, either sim or arcade. I don't think it would turn out well at all though, since they don't have prior experience.
I'm intrigued to see how Strikers will turn out, since soccer is something I'm interested in as well. Something that I would really like to see is a Nintendo cricket or squash game. This will almost certainly not happen, but I can dream, right? The cricket games are reserved for the cricket markets i.e New Zealand, Australia, England, so I haven't played a console one, but I have played the PC Brian Lara series. And I don't think a squash game has ever been made, so I'm not holding my breath.