Karen on BB5 over Cowboy IMO. Cowboy was just. so. dire.
Maybe Cappy on BB6? He left a HUGE mark on the game but I dunno who you'd replace with him with. Maybe James? BB6 is a tough one
Maybe Amber on BB8 instead of Jessica aswell, as much as I love Jess I think Amber had a more central role in that season for being such a fail.
Maybe Matt over Sharon on BB9. Sharon was just the queen of pawns who got screwed over and not much else. I'd replace her with Matt of maybe Joshuah
Otherwise I'd say perfectooooooooooooooo.