I'll describe it in four different ways: Music-wise...personality-wise...and silly/mean-wise
Music-wise:
Freddie: Genius
Brian: Talented
Roger: Amazing
John: Great-Composer (I couldn't think of anything else :X)
Personality
Freddie: Flamboyant (ah...dur)
Brian: Intelligent (aren't they all? <3)
Roger: Handsome (*giggle*)
John: Shy (No shit :P)
Silly/Mean (Oh yes...this shall be fun ~>:D)
Freddie: Hairy
Brian: Poodle-licious
Roger: Conceited (Mirror, mirror on the wall...who's the fairest of them all? Is it...me? DAMMIT YOU STUPID MIRROR!! *break* :D)
John: Geeky =p
^___^
Freddie:Hairy
John:Bald
Roger:Blonde
Brian:Frizzy
Music
Freddie:Epic
Brian:Consistent (as in throughout the 70s and 80s he always came up with the goods)
Roger: wannaberockerturnedpoppyattheturnofthe80s
John:Poppy