I always forget to save for some reason. For some systems like the PSP, when I'm done playing with it, I just put it in sleep mode, so there is never a reason to save. I hate saving because its a waste of time. So I would play like 10+ hours before I actually save and on several occasions, I exit the game or the battery dies before I remember to save.
If it weren't for auto save in some of my games, I would be starting the game over every time I play it.
Dragonfly - Level 6x Tia Sig Made by Synlight