quit

@quit 

One 15|10 game is better for improvement than three 10|0 or two 10|2 games or five 3|2 games.
The increment gives you time to win a won position or draw a drawn position.
You cannot be flagged by fast play and premoves.
15|10 is the olfficial rapid time control like for the rapid World Championship.
A 15|10 game of an hour is worth of analysis.
10|0 games are in fact blitz and full of blunders, not worthy to analyse.
It is the analysis of lost games that helps you to improve.

15/10

I mean 10|5, also you can make a game with custom increment so technically it can exist.

20 sec | 1

I can require so long to think that I run short on time in 60-minute games, so I prefer 45 | 45.