ROI is a much more significant number if you are including both normal SnGs and DoNs because of the different prize structure.
Once you are up 20-25 buy-ins, you can be fairly certain you are a winning player. You will need about 1000 SnGs under your belt for your ROI to come anywhere close to converging. 30 SnGs doesn't tell you much. You could be crushing the game or you could be running good.
In terms of the baseline, it really depends on the structure. For DoNs, ~15% ROI is sustainable for the low limits. For STTs, ~20% ROI is sustainable for low limits. Technically, any true ROI > 0 is good.
TAG and LAG are not really the ways to think about most SnGs. Learning to steal and to ICM push/fold is a much more efficient way of thinking about a game where you are almost always short stacked.
Originally Posted by Numbuh 0ne
You need a lot bigger sample than that i would think around 500 games you should start to really see where you are, use good brm though and you should have some real success. Also if your playing d&n then you need to cash about 60% of the time to make a small profit. Reg sitngo's are better for the good sitngo player. Check your roi on sharkscope to track your progress
If you cash in 60% of DoNs, that's around 15% ROI which is very very good. At Stars, anything above 52% is a profit for the 5.20+.