AngryDM describes the "eight kinds of fun" and how they relate to role-playing games. My top enjoyments are fantasy, fellowship, discovery, and expression -- but in varying moods I can enjoy them all. Here's my summary of his take on the eight funs:
1. Sensory Pleasure: This is the pleasure you get from things you can see, hear, and touch. Physical books, art, dice, music, maps, diagrams, miniatures, terrain, and props all bring a tingle of joy to the sensory pleasure seeker.
2. Fantasy: Fantasy is the pleasure you get from losing yourself in an imaginary world and pretending you are someone you are not. It is escapism. It is immersion.
3. Narrative: Narrative seekers take pleasure from experiencing a well-told story as it unfolds. The better put-together the story is, the happier the narrative seeker is.
4. Challenge: Challenge seekers see the game as a series of obstacles to overcome and foes to be defeated. They want to test themselves and win. If they fail, they want to know the failure was fair and next time they will do better.
5. Fellowship: Those in search of fellowship view the game as a framework for social interaction and cooperation. They enjoy camaraderie and social interaction and working together with a team.
6. Discovery: Discovery seekers like to explore and learn new things. They like to uncover things. They view the game as uncharted territory and get a thrill every time they fill in another blank on the map.
7. Expression: Expression is the pleasure you get from expressing yourself creatively. This is the desire to create something that is unique to you, to say something about who you are and what you believe, or simply to impose your creative will on the world around you.
8. Submission/abnegation: Submission is the pleasure you get from turning off your brain and losing yourself in a task you don't have to think too hard about.