What colour iPod Touch 6 should a guy get?

I've always gone for gray/black.

if you're looking for resell value I think the colors tend to go for more, but ultimately that's a question that only you can answer. ANd if you're going to put it in a case, who cares what color it is?

I've had 7 or 8 iPods usually silver or gray. I bought a blue 128gb yesterday. I figure something different, why not. Got it engraved too. I think the 5th gen. cases will fit. I've got a couple spare clear ones.