I finally, FINALLY, finished Hell in Spelunky.
I had last played the game--and beaten Olmec--a couple of years ago, but picked it up again recently. I eventually learned to rob shops and the Black Market, but even so, jumping through the hoops required to even get to Hell is quite a challenge. I found that I have the focus to play just one good attempt (post-Black-Market, say) a night; after that, I play hasty, which is nothing but death. Thus, for about the past month, I've been playing one good game a night, and tonight was finally the night.
Anyway, I feel accomplished, and relieved, and I'll probably put the game down for a few night. I'm still interested in mopping up the last of the achievements, but I don't think those'll have the same kind of emotional pressure.
Edit: 24 hours later, still feeling good about it. This must be what a ghost feels like after its murder is avenged.