I was upfront with the wife before we started dating that I am a gamer and always will be. At first she thought I was a dork and that gaming was a waste of time and money. Obviously she wasn't a gamer at all. Flash forward to the present day, she still thinks I'm a dork and that gaming is a waste of time and money, but she loves watching Netflix on the ps3.
I wouldn't say it doesn't cause problems ( always get the inevitable " why'd you buy another game when you have 20 already " comment when I buy a new game ) but I prioritize so gaming is pretty much the last thing I do every night.