Just piping up to say I agree with the above.
Mostly, I don't like the overuse of pastels or neon-bright colors, and I feel like I see far too much of it in games these days. Kind of ... renaissance or Picasso painting palette oriented, perhaps. Which is fine in some cases, but it's an overall trend I haven't particularly liked.
Exactly. I usually like the use of the complementary concept (i.e. Cyan-Orange) or overuse of atmospherics in paintings and concept arts, but it barely works in-game. Colors don't convey an interesting message if they're overused (call me old-fashined, but I still like to watch B/W classics).
I always thought Leon Boyarsky (Art Director on Fallout, Vampire:Bloodlines) got it right. Like the room of Voermann and Jeannette, the furniture and tapestry already said much about the person, or the overall moistly, decaying look of the streets. Everything looked very natural while remaining expressive in a non-forced way.
Bioshock looks too much of a circus place. But maybe it's also part of the X360, I heard MS enforces developers to increase the saturation so that people can say "Ohhhh and Ahhhh!!!!".
That's what Ken Levine had to say in the TTLG forums to those who seemed to be worried about the quality and the somewhat questionable marketing push.