Different strokes for different folks, and everyone's situation does change of course.
I'm still just as committed to the hobby as when I started in the late 90's...I was originally just collecting the machines to own and to play them, but had no idea how to fix them. But then I started to learn and found out that I had just as much fun learning how to work on them, upgrading and/or restoring them, etc., etc. And then I got a couple of pins and learned just how much fun a good pin was, too.
And of course helping to organize CAX each year has been a labor of love...it's not easy and it's a TON of work, but I wouldn't have it any other way !
But balance is also important...along the way, I met the woman who would be my wife (amazing she puts up with me), and we now have a terrific 2 year-old son who is already asking to play the games regularly...the past couple of morning he's woken up saying "Play Sinistar?" "Play Star Castle?"...seriously

...it's pretty awesome...
And I also maintain other interests of course..I'm still an avid downhill skier (sorry, boarding is not for me), still a pretty good badminton and volleyball player, like to cook, still listen to my favorite types of music, enjoy watching a good football game (no soccer!)...and of course make time to be with my family and friends.
But I do know some folks who get in and then end up getting out...for various life reasons. Their choice of course...the only time I find it annoying is when they let their significant other dictate the change, but again, that's their business.
Bottom line: I love the hobby for a myriad of reasons that go way beyond just playing the games, but I don't let it dominate every aspect of my life either.
Jon