I play pretty TAGish poker, 20/11, and i have a solid winrate of a little over 4bb/100. I think you can make the most money by playing tag on 8-12 tables rather than really focusing on fewer tables. So in my biased opnion I would say play around 20/10 poker and youre going to be making some money. As for your question on what is an acceptable winrate, heres some food for thought...if you have a bb/100 winrate that exceeds 0.0, you are better than half the players out there. So any winning player is ablive average. Anything better than that is gravy.