The ideas are nice, but you need a bit more practice.
Try playing some of the popular DM maps on various servers. Get a feel for what makes a good DM map in terms of size and constraints; these free floating maps tend to get annoying sometimes.
Also, making shapes with the polys. Try experimenting more, staying away from long, jagged shapes. Breaking a larger shape down into squares and triangles helps with stretching textures and shading later on.
Speaking of which, shade. Add color. Where's the light coming from? A few darker colors can add the illusion of depth and shadow with better constructed polys.
Just a few suggestions.
The rest of you buggers keep it constructive, even if you don't like the maps.
