Most of it is gunmetal...
Actually, many robots are metallic in color, so I don't see anything very wrong with that...
Well, I don't really care about the Titans, since I prefer the canister sets. I agree with almost everything bonesiii says, though . I detested the Rahi from day one, and prefer the recent type of titans. But that's all my personal tastes.
EDIT: Oh, and to be clear, I prefer the sets Lego releases to MoCs . I haven't seen a single MoC I'd ever spend money on, save the Fikou Stocking Spider . Again, just my own tastes.