I like to play through to the end of the game so that I can see how close I was. For me the game is more important than the final numerical result (although I also play rated games to gauge myself against other players).

But I don't get upset if other players resign when they feel they have lost - although I have seen a couple of resignations when, with a bit of luck, they would have been in with a chance!

Cheers,

DK