I absolutely hate save files on handheld consoles. Especially DS and PSP because you can put them into sleep mode. I have been playing a game on the PSP every night before I go to bed. In the game, I'm just grinding battles to get all of my characters around the same level and get some extra cash and items while doing it. Since I'm not progressing through the story, I don't think to save often. Last night, I dropped my PSP while walking to the bathroom and the console reset. I know that it's my fault for not saving often, but the saving in the PSP is annoying because you have to type in what you want to name the save file every single time I save.
Anyways, I'm pissed off, and I don't want to play the game anymore because of all of the progress I lost.