Ok, this is a very easy one for me.. I really REALLY like the art from Free League's "Coriolis"
Actually, Free League really seems to know how to fill all their RPGs with really great art
From Mutant Year Zero, Tales of the Loop, and everything else they do is just totally awesome and inspiring to play! The whole Arabian Knights in Space theme for Coriolis is totally genius!
But for me Coriolis for the WIN.. hands down!
Here are some samples..