This is how I go about voting:
As it should be, conversions or using non-BFG models, mean nothing to me. I only care about the paint on the model.
That being said, I'm looking for a combination of skill level used, and the amount of detail put into the model. The best painters, in my opinion, can pick up almost every detail that is on the model. For example, the 1A entry "Imperial Fist Strike Cruiser" and the BB of the same paint scheme, are solidly done paint jobs. I would game against them any day. However, in a painting competition, there are too many details on the model the painter simply did not find a way to bring out. By the same comparison in the same round, 1E "Bakunin Repulsive", the painter was able to highlight every beam on the model. On top of that, he found a way to paint multiple shades of color inside the tiny spots between the beams, and still highlight the beam.
After that, I look at skill. Did the painter use any neat effects? The obvious one for this example is the Tau fleet AC. I look at that, and I have to ask myself one question: How did he do that?
I honestly don't give a lot of credence to the base job unless it's super fancy. I know some people like keeping them clear, painting them black, others with stars, and others go all out. So for me, I give a few bonus points for doing a good base job, but I never take any points away when making a decision.
My list of honorable mentions that I want to congratulate: 3E "Acheron Heavy Cruiser", CD "Fleet Neaxe", and DB "Tau Fleet". I thought these were ones that were just some unreal paint schemes to them.
-Zhukov