I like the global style of #3, but i prefer something a little more technical style and i'd like to have the head of the dragon instead of just the eye.
and the logo should be on white backgound, so we can use easy everywhere.
#7 is good, but as aready stated in other comments maybe a little too monocromatic (all blu) or all red (#8) and i don't like how Drako fold out (in the round Style). I prefer something a little cleaner and maybe some other version of the dragon.