Man, The Hobbit map is still one of my favourites. With the moon writing and everything. I would stare at it for hours!

Dungeons are one of the places I do like to map out. The theater of the mind for me comes more for things like "a fight in an ally" I don't want to stop the game, and spend 10 minutes drawing a battle map, when everyone has a "pretty good idea" what an ally looks like. That's when I like to just run with it.