As some other posters have said already, it depends on the game. In some games, dying a whole lot is just tedious. In other games, it presents a challenge, and I feel a great sense of accomplishment from finally getting past whatever it was that kept killing me. To some extent, this may be due to mechanics. In games where my failure is due to (or at least feels as though it's due to) problems with the game's design, I tend to lower the difficulty because the challenge doesn't feel... legitimate. As such, it doesn't engage me, and I feel like I'm wasting my life, so I either lower the difficulty or quit. On the other hand, when I feel that the problem is due to a deficiency in my skill or an inability on my part to figure out what to do, then it becomes a tantalizing challenge, and I rarely lower the difficulty or give up on the game.