I "quit" WoW about halfway through WotLK; at the time I was raiding heavily in a progression guild and also writing a popular WoW blog (had over 1200 subscribers) but I kind of got bored and wanted to work on my fiction writing. I felt bad about walking away from the blog, but my readers and also my guild understood though.

Now I'm playing WoW again (and blogging about it, in fact), but I'm over the initial "angst" about it; I guess now I don't care about popping in and out of the game for months at a time. It isn't as big of a deal to me as it used to be.

It's occurred to me that it's kind of strange to talk about "quitting" a game; with most other games your interest in it just kind of peters out rather than there being a decision where you sit down and actively quit.