I do notice a bit of a smell vaping tobacco carts, and my office has accumlated a bit of a tobacco shop smell. Nothing unpleasant, but present nonetheless. No one else in the office has commented on it, though.
Around the house, the wife sometimes seems to detect a smell; it may be partly (or mostly) psychological, but I know her to be hypersensitive to odors.
I've also noticed that carts can get a rather foul smell when they're gunked up and in need of cleaning (or disposal). I also had one bottle of liquid that had a very foul odor and taste to it; my wife complained about that one until I got rid of it.
In any event, it's never much of a problem to accomodate her if she thinks she smells something; I'll just sit further away or go to another room. One liquid she did notice in particular was Ecopure Rich; she said it smelled like roasted marshmallows.