My other strange quirk was that I would reach the end of a JRPG and delete the save, start again, but this time around do the sidequests etc. which I didn't tend to bother with the first time around. I don't do that anymore, but back in the PS1/2 era, if it was a great JRPG, I'd try and squeeze that little bit extra out of it by not seeing the ending. I did it with FF7-10 and some other (usually Squaresoft) JRPGs. I didn't buy that many games, but when I did, I tried to make them last as long as possible.
I remember with FFX-2, upon beating the last boss for the first time, I actually turned the TV off, made some dinner and turned it back on after the ending had finished. Purely because it had the new game plus feature and I needed to save after the ending. So yeah, that's one freakish quirk that I'm glad to be rid of. I did contemplate doing it with Persona 4 Golden, but it worked out that I didn't get the best ending anyway. That's reason enough to go back to it eventually, to get the perfect ending.
I can't imagine too many people do that.