I met my wife in CoH and am very happy. We don't game together so much anymore, she spends lots of time with the skyrim toolkit and I tend to spread it out over a wide range of games (not so much MMOs anymore, I just don't have time) but it really doesn't have an effect either way on our marriage. If there's anything that causes issues in my marriage it's my really long hours at work, but I won't be certain working long hours causes marital strife until someone does a study and tells me it does.