Final Fantasy XIII was a MAJOR disspointment. Loved all of the games in the series so far (except a few of the GBA ones), though this one was a letdown... After 25+ games, you would think they would get it right?
As most people have said, it really depends on the circumstance, but I would rather be more precise with the stylus in most cases though. Some games really require a stylus, like LoZ: Phantom Hourglass/Spirit Tracks, and my DS touchscreen is already receiving some damage from back when I used to use my fingers!