Square Dance Guru?
-- ? ? ? --  Stewart is the Square Dance Guru

Likes 'em thin?
-- ? ? ? -- Paul prefers 'em thin Stewart prefers bears

Stewart or Grant
Here's another handy checklist:

Sometimes sounds like an alien?
-- ? ? ? --  Grant sounds like a Canadian

Asian or not?
-- ? ? ? -- Stewart is not at all Asian

Bearded?
-- ? ? ? -- Stewart has a beard

Fabulous Outfits?
-- ? ? ? -- Debbie is known for her fabulous outfits

Balding?
-- ? ? ? -- Only David seems to be going bald

Pasty-white skin??
-- ? ? ? -- Grant and Fen are not pasty-white