My comments:
City: Doesn't look like this map is for building.
Weird Valley thing: Looks horrible, and you forgot to cut out half life 2 on the bar, makes one wonder...
kitchen: Looks horrible, you are hiding are bad modeling job that is covered by textures, may look nice in pictures, but it makes it look horrible in game.
Lake: Were do you build, I see a dock to build on, but it looks like building on it would be a pain.
Orange Box thing: You took textures that are used for reference, and applied them to a 2 minuet modeling job, congrats.
No one cares about you.