Personally, I like 2 & 3. I think #1 is the worst of the group. It is bland and boring. #7 isn't visible/rendered/accessible. #9 is interesting, may be combine it with 2 or 3 with a different and smaller TUX. However, I've really never been that impressed with TUX. Someone complained about SGI's 3D cube logo. That was THE BEST logo. It was a LOT better than the Homer Simpson one that followed and I kind of find #1 leaning in that direction. May be that is why I don't like #1, too simplistic and low tech. Just my personal views.