I really like how clear and easy to read these floor-plans are. With the map key you could easily see at a glance what's in each room. The next step I'll be working on once I land on a quick style that I like is to include (as you have done) doors, traps and other related elements into my quick dungeon maps. BTW, what are you playing? Some older version of D&D or a retroclone?

Cheers,
-Arsheesh