I wouldn't want to fight the Fonz, myself or Dagga because they'd probably win.
I wouldn't want to fight Psychotic because he could ban me, and he probably smells bad too.
I wouldn't want to fight Avarice, Kikimm, Resha, or Jojee because they'd all kill me in horrible ways and I couldn't bring myself to hit them.
I would fight GB, but he'd probably puss out because I can't guarantee it wouldn't involve chainsaw rape.