1) Where do you get an inspiration? Dreams, real world, intensive thinking?
2) What is more important for you - graphic/gameplay/story and atmosphere?
3) What theme do you like more - technical/gothic (in Q3)
And if you have some secret tips for other creators of maps, put it here, please.
1) From all sorts of sources: when it comes to gameplay I mostly try to base it on my own expericence:
+ From the best maps. Ex. Ironworks in quake live.
+ What I would like to see in a map.
The architectual part comes from old games (final fantasy, metroid etc), books at the library on architecture, observations from the real world, imagination,
but also from fashion. Old school architecture and great fashion designers like Lanvin have excellent colour combinations and proportions.
2) Depends on genre I think.
3) I don't know if it's a limitation of the game engine or not, but both texture packs feel so outdated in terms of resolution.
I'm a noob so my tips are for noobs:
Draw concepts/layout on plain white paper.
Think in terms of rooms. Start with smaller ones. Go from big stuff to details. Create details in a seperate file and copy and paste.

Standard measures: 2, 8, 16, 64, 128, 256 (powers of 2).