i liked your second map better. but il be honest and say you got alot of work to do. heres my suggestions...

texturing; your texturing is mostly hidious, especially the liquids on walls and stuff. its best to stick with one texture set. complex achitecture: this skill is mostly learned only by making more and more levels, and observing other good maps for guidance, keep at it, dont give up. go to pfhorums and find, checklist for mapmakking by RyokoTK. there you will get all the real info you need.

i dont mean to be harsh, you just need to practice by making more maps (if you want to improve), but dont give up, we could really use more good mappers. i hope this helps...

also any advice that people give you in a rude tone, or try to chew you out. ignore their oppressing comments.. yet at the same time consider what they are saying...