For me, one of my biggest pet peeves is that very, VERY few e-cig devices come in a brown-cigar color. I can't understand this. They make white to mimic cigarettes... why not make some 510 or eGo or whatever devices in brown (NOT woodgrain)? I'm also sick of blue/green/whatever LED's. I'd rather have an amber LED or NO LED.
I actually prefer my vaping to NOT draw attention so the more they look like analogs the better, and my preferred analog is a cigar or pipe.