There are some earlier seasons I haven't seen, so I may add to this list if I am able to see them at some point in the future...
Favorites: Yul and Yau-Man are my absolute faves. Also very much like Tom Westman, Earl, Tasha.
Least Favorites: Rob M, Amber, Benny Wade, (Insert First Name Here) Hantz, Colton, Sophie, Ami, Corrine, Troy, Kass, Tony, Todd, Parvati, Abi-Maria, NaOnka, Alicia, Hatch, Sue Hawk, GC, Dreamz, Reynold, Hayden (Who I didn't have a problem with until the rock drawing TC when he said "Second place is first loser." I despise that phrase/attitude.), and Brad (Because of his misogynistic comment about "weak female winners like Kim.") ETA: Ben from Samoa and Shannon from Nicaragua.