i have had good success in on line sports betting, then tried to get into poker, read all the books, must have 10 of themin my closet, really studied them and learned a ton by the way, started slow on line, won a bit, and when I stepped up to higher level games I came out a loser, and pretty big loser, I dont have the same style at on line cards to stay tough and always make the right choices for some reason. Also after being trapped by at least 2 playing partners on line I gave it up. lifetime loser -$6k or so in poker. I might go back to it at some point.
basically I could be honest and look in the mirror and realize that while not going on TILT per say I would just make various not sound plays in the urge to win a hand.