kinda depends on how you want to spend your time. If you like checking doors for traps and hitting 's' a lot, choose a thief. If you like throwing coins and hovering up dungeon junk, merchant. If you like not being able to kill monsters or defend yourself properly, mindcrafter. Personally, I think that killing monsters and progressing through the game is more fun than trying to scum my character to the point where they can do some damage, so I usually scratch all the weaklings from my list.
"Whip me!" pleads the adom player. The rng replies... "No."