I'm the OP.
I appreciate the discussion and agree with much of the criticism. Philthy has it right. As I said at the beginning, I laid it down because of a wrong read. My point was really that it was a tough hand to lay down, but I did it anyway - something that would have been difficult for me a few months ago. I consider this to be progress. And while there were certainly lots of other hands that the villain might have had, I considered 23 a real possibility because he was in the blind and could have had anything, and this was a player who'd been making lots of pre-flop calls.
Had I been clairvoyant and correctly put him on his 4,5, I would have pushed. I would have lost, but it would have been the correct play. I understand and agree that a results-oriented approach to the game is wrong, but if an occasional bad read like this saves my stack, I'm sure not going to regret it.
In describing my progress, I'm not saying this was the best play, but I am saying that my flexibility to consider laying down even good hands has cut my losses. It's a pretty hard thing for a beginner to do, and the relentless coveting of TPTK has been an expensive mistake for me. How do people play me differently? Since I'm tighter, I think my bets have more respect. I guess one weakness I have is unless I'm close to the nut I often will fold to a re-raise. I think I was bluffing
and position betting too frequently before anyway, so now I'm not being so adventurous and am betting more for value, which tends to keep me out of trouble. When I do bluff, my bluffs are working better and I've even had success as a re-raiser.
It's a complex game. I'm trying to figure it out. All your comments and criticism are appreciated.
As to the general theme of folding the best hand:
If you can't fold your AK or Queens you have no chance of winning a
tournament - Jennifer Harman paraphrase...
"If you can¹t fold the best hand you can't play." - Amarillo Slim
"If you can't fold the best hand, you aren't a poker player." - Doyle Brunson