Unless you're married, then you have your very own live-in landlord who makes the rules.
My wife was never a smoker. I always went outside to smoke because A) it's just nasty when a house smells like smoke, and B) we have a small child. But since I've been vaping, I do it indoors. Early on, I would vape outside, just because that was part of the habit and it helped me quit smoking. She grumbles about the vape smell most of the time. About the only thing I vape that she doesn't mind is Five Pawns Castle Long, which happens to be my favorite, so I lucked out there.
I usually keep it to my studio, because that's my space. But if we're watching a movie or something and I'm vaping, she waves her arms around trying to clear the clouds and holds her hand over her nose to make a scene...because that's just what wives do. I may or may not be blowing clouds on purpose just to annoy her...because that's just what husbands do.