First Gen wrote:One predominant trend I see is people voting for the best art, NOT the best cover. Some of these covers that are in the lead are impeccably drawn, but either you can't tell who the spotlight character is OR it doesn't look like a spotlight cover at all.
I suppose that's an artifact of most of the voters being artists. I have no natural eye for art technique whatsoever, so my choices were more composition-based.

I tried to consistently look for the following in the covers I voted for so far:
Does it feature the lead character *and* sell their personality? There were a few really good covers I passed on because I didn't think they captured the lead character right. And others I passed on because, as you said, it didn't give the lead character the right focus.
Are the other two characters doing something other than standing around? It feels a little limp to me to have the two background characters just posing because you had to include them. Admittedly, this is more personal preference than an objectively important criteria - I like action art, not pinup art... but, pinup art *is* valid - but I do have to vote for which cover would attract my eye in a store. Had to pass on an otherwise really good Air Raid one based on this, but I'm glad to see the artist is still in the running.
Does it follow the assignment? One cover had a great head shot of Perceptor, but didn't have the other two characters or the setting. Another cover was wonderfully drawn, but didn't look like it was good for *coloring*. Too much ink shading and not enough cleanly defined lines.
Not that art style isn't important... there were two similarly-composed ones of Perceptor where one was drawn a bit better enough for me to choose it. But there's so many well-drawn covers here it tends to end up coming down to layout for me personally.