I've wanted my Steel/Ghost for a while (haunted armor FTW)
More Poison type combos would be nice too.
Poison/Steel Poison/Rock Poison/Ground Poison/Dragon Poison/Ice etc.
I'm in for Poison / Dragon. It could be an evil looking, purple dragon with huge wings that have poison on them. And it should have a signature move named Poison Blast: A 90BP move with %10 chance to toxic the opponent. It should have 100 Atk, 115 Sp.Atk, 75 of both defenses and 100 speed. It's ability should be Levitate. I'd slap Earthquake, Draco Meteor and Poison Blast on it. Seriously, I want a poison dragon...