There are a couple things I don't know what to think of.
Belmont. I don't know anything about them, but seem to be one of the few people picking Wisconsin over them.
Oakland. I feel like Texas is getting underrated. I haven't seen Oakland play, but the few times I've seen Texas play, I don't see how they don't win a couple games.
Michigan State. They suck, but have been playing some good ball lately, other than that Penn State game. It's also March, and Izzo and the Spartans love March.
Utah State. Thought they would be much higher than a 12. And they're playing Kansas State, another team I'm not sure what to think about. They have plenty of talent and a very good player, but I'm not sold on them due to their underachieving this year.
I currently have OSU/UConn/Pitt/Kansas in the final four. Notable upsets are Utah State over Kansas State, Michigan State over both Florida and Notre Dame (lol at me, I know), St. Johns getting to the Elite 8, Richmond over Vandy and Texas over Duke. Everything else is either a minor upset or not an upset at all. I'm sure I'll change a few before the tourney starts.. but I'm not liking my bracket at all right now.