While I like many of the changes in DCSS, I have stayed on 0.24 because I'm wary of how the game will play without food. I kind of enjoy struggling through the early-ish game without using permafood, and then seeing a pack of orcs and going "Hey they look tasty, maybe I can eat some of them before I starve to death!"

That being said I want to play Djinn eventually so I'll upgrade when that time comes.