Your detailing could really use some polish.
http://i.imgur.com/kCZmRzL.jpg
Texture wrong and bad looking vents.
http://i.imgur.com/R7rVw01.jpg
Wrong brush face.
http://i.imgur.com/3mywZCC.jpg
Nodraw on sides of this looks weird.
http://i.imgur.com/5K68oL0.jpg
Don't like the external beam on the shelves, never seen anything like it.
http://i.imgur.com/QtBsdXM.jpg
Crate intersects with wall.
http://i.imgur.com/ytOVKwG.jpg
Z-Fighting.
http://i.imgur.com/qwJe7cg.jpg
Metal sheet goes through wall.
http://i.imgur.com/aAvu18H.jpg
This prop looks terrible.
http://i.imgur.com/0ZL5heU.jpg
In this room you can really see it, you need to use point_spotlight for a more subtle light effect.
http://i.imgur.com/0aKhgbb.jpg
Blocklight on all doors.
http://i.imgur.com/EvIwRQt.jpg
Props intersect.
http://i.imgur.com/RWwzNyy.jpg
Crate intersects with wall.
I could probably find more if I look through it.