Hi there...
We really like logos #1 and #2... the colors are bright and glass like, and you've been able to get both "NCAGG" and the full name of the organization in a simple, uncluttered image.
The later logos are getting a little too busy -- with dark lines around the glass colors, outlines around the letters and so forth.
Simple and tasteful is the direction to go!
We look forward to seeing more of your work.
Emily Pezzulich