For me it seems to be the tee on holes that I always seem to hit bad drives on. You mentioned the re tee after an OB shot, that could very well be the toughest, so easy to step right up and hit an identical bad shot.
This. There's just some holes that have crept into my subconscious and are picketing for me to fail. I've been slowly fighting back and now one of those holes at my favorite local course is less of an issue. Still have two of them at my league course to tame though.
Fairway bunkers take second for me. Especially the ones with soft sand.