BW - Don't really have a favorite yet. Liked Dominick Cruz as coach on TUF, but haven't really seen his fights. Liked Wineland in the last UFC)
FW - Same as BW - not against lighter weightclasses - just don't know enough fighters there yet
You should look up Michael McDonald and Renan Barao. Both are exciting young fighters at BW and Renan is defending his interim belt against McDonald.
For FLW, I would suggest looking at John Moraga's past 2 fights. He has looked very good and is one of my favorite new fighters to watch. Also, Ian McCall v. Demetrious Johnson I was a great fight.