Are you acting like you want to spend more time with the game instead of her? This is regardless of whether you're properly controlling your gaming time or not.
I don't think so. For instance, last night I told her that later in the night I'd probably go on for a little bit after we spent some time together (close to her bed time). When I came home from work we all hung out, cooked and ate food, did kids baths and bedtime routine, watched a couple of shows, worked out. Then as soon as I stood up she went "oh, running off to your second family" in a really nasty tone. Actually this made me really angry, but I kept that internal. I felt like I did nothing to provoke the reaction I received. I don't talk about the game anymore, I don't play while the kids are awake, I don't post on the forums at night, I don't involve her in anything with the game because she mocks all of it. My focus is entirely on my family.
Are you happier when you're gaming than with her? Do you spend more time thinking about WoW instead of her? These can manifest in your behavior and though subtle, she can pick up on them.
Happier is tough to answer. Lately? Yes. The reason I say this is just how nasty she's become over it. I'd rather be by myself lately. When we're just relaxing at night it's fine, but she's also been nitpicking just about everything I do lately - I stay up too late, I didn't put something away correctly, I'm not working out enough, I don't care about my health, I care about WoW more than her, I have too many hobbies and too little time for her, I didn't do the dishes to her liking, etc. The mood in the room can go from everything is fine to I want to murder my wife in about 3 seconds, and it happens CONSTANTLY.
I don't really think about WoW outside of "I have to be online for 9:30PM tonight." I'm not obsessed by any stretch of imagination, it's just something I do a couple nights a week. When I was a kid I played 7 days a week, I just don't do that now.
BTW, something I've noticed. Her mother does this to her father, except they now spend 0 time together. I guess that's what my wife is subconsciously pushing for because most times she's just making me angry. It's been a long time since you guys got some quality Noodleface complaining.