Breja: It's about buying the games you want, not hoarding stuff for the sake of having it.
DubConqueror: I always fall for the trap it's much easier to buy games than to finish one
That's the whole point. I actually didn't finish most of the titles I have ever played as a child. Mostly because of certain lack of self discipline, as I could just grab another title and simply have fun. That was a problem of starting something and not finishing and having just games for the sake of it. This problem also reflected how I treated everything else (for ex: reading books, learning at school). I guess now I'm sort of coming back to finish them one by one just not to feel guilty about it, however childish that sounds.
Also, loads of titles come and go from GOG, I have no idea how many classics I have missed and how many good games never made here? Like Blade Runner 1997, Flashback Quest for Identity. I still got Duke Nukem 3D and Mac versions of Fallout 2 & Tactics that are gone from the store. I've no idea if it were about copyright or system compatibility issues.