from the
german forum:
100 games: ~23%
300 games: ~40%
1000 games: ~66%
2000 games: ~82%
it says that if you play 2000 games there is a 82% chance that your current roi is your "true roi". most likely you will never have enogh games to really figure out your true roi. the games/opponents are getting tougher and your own skill is evaluating as well...
it´s hard to say what a "good roi" is. it depends on a lot of factors:
- which limits do you play (higher limits -> better opponents -> lower roi)
- do you play normal speed sngs, turbos, superturbos (faster structure -> less time to wait for good spots -> lower roi)
- how many tables do you play at a time