Okay, I played WoW, Rift, Age of Connan, Aion, Lord of the Rings online, Fable, Diablo 1 + 2, DragonAge Origins and DragonAge2, Buffy and Chaos Bleeds. All button-bashers, either 'press 1 to hit things, press 2 to hit things harder' or 'press red button to hit things, press blue button to hit things harder'.
DA and Fable are kind of exceptions (probably the reason I still play DA), because despite the button bashing, a large part of the game is actually about lore and character development rather than fighting, which I like.
No, never tried any of the games you mentioned. I'm rather limited when it comes to playtime, but I'll have a look at them.
As for getting addicted, you said it yourself, when it starts affecting your relationships with other people and with what is going on around you, there's a good indication that you're overdoing it. I don't know how many hours per day or week are 'normal' - depends on how much free time you have.