Da.
Anyway, I think I'm one of the few mappers that decides on a theme and then makes the thing. I, for some reason, am incapable of making everything in dev textures first. I need to immediately see what I make.
There's so many themes really...
- Mediëval
- Egypt
- Western-style
- Alpine
- Snow
- Space
- Ghostly/haunted
It entirely depends on what style you like. Don't pick a style that you think others will like if you won't. Pick something you really want to make. When I made MvM_Yucatan, a Mayan-themed map, I knew in advance that a lot of people would find the not-so-TF2-style textures a turnoff. But I didn't give a ****. I had that theme in mind so I made it.