[frappeboy]

I'd check/call on 6th street because you probably are behind someone. I would check/call 1 river bet with 3 kings but I wouldn't call 2 bets. If you fill up, I think you bet if your opponents are weak and aggressive because you are so likely to get 3 bets out of them. If your opponents are stronger or more passive you should check raise. I know if I had a straight and a guy with kings on board bet into 3 four straights I'd definitely just call and give him credit for a full house. So against stronger players you get more money by check raising.