When to call it quits.

For the last couple of months, I have been playing DC Universe Online rather religiously. Talking a few hours a day of my life dedicated to developing my character and collecting whatever in the hell you collect in a standard MMO. I've been enjoying the hell out of it, it's been fun and I feel my "main" is developed and ready for whatever the devs would throw at it.

It's been a great few months, but now I wonder if it's that time. You know the time to just call it quits on the game. The time where you have to decide if you're getting your money back out of it, or if you're just done experiencing what the game has to offer.

I was thinking about whether I would continue to pay the subscription or just call it quits. It's always been hard for me to call it quits on a game. I seem to always have this nagging voice in my head as it was coming down to the time when I knew I was probably done with the game, but couldn't put it down. I find I have this problem with all MMOs. They have this content that sucks you in, and then you've invested enough time and energy into developing your skills/character/friends whatever that you feel compelled to stick with it just to get more return on your investment. DC is no different for me.

So, when is it time to call it quits on a game?