That's not always how it goes though. It doesn't have to be a quick process. Maybe you quit a game many years ago and then suddenly out of nowhere, someone brings it up and (perhaps due to being bored with newer offerings) you just have to see how that world is going. It's a lot like an old partner, in that there's often a comfortable familiarity with a game you've spent a lot of time playing that you just can't get anywhere else.
Have you had this happen to you? Is there one particular game that, no matter how many others you try, you just keep coming back to? Tell us about it in the comments section.