One of the places where I'm a "bad" gamer is that I don't have a great love for dungeon crawls. For someone who has played as many years and editions of Dungeons and Dragons you'd think this wasn't so, but generally I don't like them.
I don't mind going into a dungeon as part of a story. I don't mind the challenges in them. In general though they tend to be my least favorite part of a game, and I think in large part it is because of how much they can slow the game down when they happen.
That said, I know a lot of people love them. So are you among the many that love them? Do you prefer them as a GM or a player? And what about them do you love? The challenge of the puzzles and traps? The focus on combat? The sense of exploration and danger while being in hostile territory?