I don't count "Puzzle/Switchhunt" as a genre, because every map, regardless on if it's action or slow based, serious or joke, can be switchhunts.
- Action, fast paced, slaughter
- Resource management, slow paced
- Joke, mock, trollmaps
- Odd, surreal, concept, experimental, untraditional
- myfirstmap.wad, first experience with an editor
I don't either consider "City", "Techbase", "Hell", "Sewers" etc. as genres. It's a theme. And again, every theme can be processed differently, either fast or slow paced, seriously or not.
Myfirstmap.wad, on the other hand, IS a genre in my view. You can see it: All of as started somehow, we still see a lot of people starting (and their efforts), and although every mapper is different, many of the first works have (I'll say it ) some similar specific points, typical for these maps. Right? :)
That's how I feel it.