I tend to get ADHD with my games.. I don't finish a lot of games right away and will get partway into a game and then before I know it another game catches my interest and I start playing that instead and then another game etc. I eventually go back and finish the games but it might take me months to get around to it before I go "hey.. I never finished.."
Like for example I'm on the last island on my first playthrough of RE4 Wii edition still. I need to get around to finishing that. This thread reminded me
I'm pretty bad in that I buy like tons of Nintendo DS games and I very rarely finish them because I only tend to play them when I'm out and about yet so many good games come out for that little sucker that I don't have time to finish them all. There are some games for the DS I haven't even STARTED playing yet but I own and have owned for months! I just *barely* started a new game on Chrono Trigger DS (but I'm not too concerned because I've beaten Chrono Trigger many many times but Chrono Trigger on a road trip or a bus? HECK YES).. and then Dragon Quest V came out! Think that's bad? It was only just before Chrono Trigger came out that I finally said oh wait, I'm basically at the last boss in Phantom Hourglass, I should really finish that!
Among the games on the DS I have not finished:
DQ5 (but that's new and I am in the middle of playing it.. when I'm out of the house and in waiting rooms and stuff)
Final Fantasy III.. um yeah.. I should finish that one.. I'm not too far into it even, I remember getting past the first island area and am in the flooded world.
Final Fantasy IV.. I've beaten the SNES and GBA version so I'm not as compelled to finish it but I AM like right there just grindin to get Meteor on Rydia I think in the Lunar Subterrane.. then.. new game plus? I stopped playing it because Chrono Trigger was coming out.. and well I finished Phantom Hourglass first.
Castlevania Order of Ecclesia
I haven't even STARTED DQ4.. though I have heard it wasn't a good port (5 is good though) so I've been hesitant to try it but I don't want to sell it back because I want to give it a chance first. But I have already beaten it on the NES so it's not a pressing issue.
Now.. some games I didn't finish because of the nature of the game itself. Now the main game of Oblivion I've finished, I completed the main quest, rose to the top of all the factions except dark brotherhood (I murdered the guy who came to me in my sleep for his stuff instead), even did all the other side quests, bought a bunch of houses, finished knights of the nine, etc. But I haven't quite finished Shivering Isles yet.. I think I'm on building a new gatekeeper. But because it's all about building your own character and having somewhat of a sandbox environment, you'll probably never really "finish" a TES game. You'll just complete quests/quest lines.. maybe it'll be the central quest line but the game itself isn't done.. besides you can always roll a new class. Morrowind.. oh man I got lost in Morrowind for hundreds of hours and never came close to completing the main quest.. finished one of the expansions though.
But eventually.. new games come out.. you put down your current game for it for awhile. Or if you play MMO's.. that sucks a lot of game time out.