re: Poker & $25 NLHE Full Ring: AA line check vs. possible BTN nit
4bet pf w intention to shove pf, esp. oop. As jewboy points out, if he's got KK, he'll go over the top of you. He'll probably flat TT-QQ, maybe AJs+ (all of which should be in his 3bet range if he's any good - if he's not, then his range is a lot narrower, but should include at least QQ+, AK).
I prefer leading this turn, which looks more like AQ/KQ/KJ (if you're right about KK, he should raise the turn - though I would've expected that to happen on the flop), rather than a ch/r, but I think the ch/r is fine.
Villain's turn bet looks like 99/JJ/AQ/KQ/KJ to me - I doubt a T would make such a small bet. I'd be a little surprised if Villain calls the ch/r, more surprised if he has AT/KK/QQ.