Charizard, Robin, Villager, Duck Hunt, Mii brawler and Pac Man. Some characters I really want to like but can't quite seem to get enough KOs like Megaman, Greninja, Wii Fit Trainer and I love Little Mac too but can't stand his horrible recovery.
I guess I need to check out more of the returning characters for changes too but I'm easily distracted by the high quality newer ones.