My most memorable adventurer was from 34.11. He began as a peasant and used exploits to max out his stats. He took some nerve damage, and became a wereape to solve the issue. After killing all the standard megabeasts, he retired, and I began phase II, building a stairway to hell. Problem is, the best place to build, which didn't have an aquifer, was on the other side of the world. So I build my stairway to hell, sacrificed a dozen dwarves, and returned to adventure mode.
I swam across the ocean to get to the hellstairway, but along the way, there was a full moon, and I lost all my gear except for my iron longsword and shield. I picked up some clothes at a local fortress, and waited outside the hell stairway for another full moon, so I could take on an infinite army of demons as a giant ape monster. I went down to hell, and started slaughtering my way through a demonic "citadel" (I don't remember if that's the correct term, but they have the adamantine weapon at the top) In my naivete, I thought I would be able to get the weapon as an adventurer. On the second or third to last floor, I got pounced by a few demons, and they tore apart my legs, causing nerve damage. I decided to fight to the bitter end and after barely surviving a couple more fights... I stood up..... wait.... what???
Turns out the full moon was over, and I was a human, naked, covered in demon ichor, with nothing but a longsword and shield in the middle of hell!!! I fought my way to the top of the tower. I remember one of the demons managed to rip my arm off (humans are much weaker than wereapes), but I pressed on, longsword in hand. Fought my way to the top, realized I couldn't get the adamantine weapon, and fought my way back to the surface.
I love the image of a naked man, missing an arm, covered in demon ichor crawling out of hell. I've never been able to go back.