What makes a fighting game?

[Paladin]

What makes Smash so fun is that it is unbalanced, has items and lot of characters. Also stages that are more than just backgrounds.

For games like Street Fighter, what makes the game is the charaters, the combos and different attacks and tight gameplay.

I think TFR seems to have most of this, so maybe just add stages that you can interact with and lots of combos?

Edit: Also, obviously, multiplayer is what really makes fighting games fun.