NSFW: What makes for fun "intimate relation"?

There is a difference between “good” and “fun”. Obviously you can have both; and that may very well be a requirement for some to consider sex “fun”... But, one doesn’t necessarily constitute the other.

Lets me put it this way… Shawshank Redemption is pretty unanimously reviewed as a “GREAT” movie. BUT it is not a fun movie.

What mood/moves do you like in the sac, where afterwards, perhaps even entirely disregarding sexual satisfaction, you’re left thinking “he/she is SO fun to have sex with!”?