Virtua Fighter 4 and 5 had a neat little feature where every few matches or so you had a chance to win a cosmetic item for your character if you won that match, and it honestly made everything much more intense, even if the item in question was silly. I would love for something like that to pop up in another game, like in 2k Myteam, with matches randomly giving you a chance to win anything from a new pack of cards to a rare card if you win, and leaving you with nothing if you lose.
Actually, after typing that out, all of that sounds more frustrating than fun to me now, so nevermind.