my favorite is 10 min
Best Rapid Time control?

If your opponent gives you a few difficult choices in a 10min game, you’re either going to time out or pick the wrong choice.
A nice middle ground is 15|10.
The increment gives you enough time to think, but there is still risk of timeout.

there is? i feel like 10 second increment is way too much. In the opening u really only take like maybe 5 seconds a move and ur gaining time instead of losing
i want to play 15 minute but no one plays it