I know I'm joining this discussion really late but I've been involved in fantasy sports for well over a decade now. LOVE them. I started when I was in high school before they became really popular. I used to track stats from weekly newspaper updates, haha. The best leagues are definitely football and baseball. Fantasy games were made for those two.

As for fantasy soccer, I haven't heard too many people playing it which is a shame. Has it caught on in Europe at all? There's a whole market there to be tapped!