Chess Variant suggestion- Cooldown chess.

Thanks for the link, checking it out now. Idea is:
Both players can make moves at any time.
Each time you make a move, you have to wait 2 seconds before you can make another.

You can make the cooldown time variable, like 5 seconds or so if players wish for more time to think etc.

meh, doesn't sound fun at all, just crazy

I consider bullet chess to be not fun, but a large amount of players like it. This would appeal to those players who like quick thinking, reflexes etc.