As a couple others have mentioned, Far Cry2 was beyond painful, dragging your ass across the map for the same missions over and over again just crew insane. Each mission was the same, and the enemy with their typical far cry vision of being able to see any distance and through any object to see you was one of the worst things ever. Then the ending was even worse, then the game.

FF12, GTA4, GTA:SA and the second half of bioshock, are also up there.

But one game i could not get enough of was Saints Row2, i went from mission to mission wanting more.

Forced myself to play through 5 whole damn seasons of top spin 2 to ensure i got a certain achievement regarding overall ranking points accumulated during career mode.

i was bored of the game after 2 matches, in the end i ended up playing over 200............

PAINFUL.

^I feel part of your pain. I played half an hour of Top Spin 2 and wanted to kill somebody.

Thank you, Sega, for creating Virtua Tennis, you know, a GOOD tennis game...

I forced myself through the following games

Resistance 1 (ps3): coming from pc fps gaming for the better part of 10 years.. well yeah it just doesn't match up one single bit. finished it because it was all that was out at the time.

Prince of persia: Warrior within (Ps2): Pop1, pop3 = fine, pop2's fate was sealed when our strange prince swore during the fighting on the boat at the start of the game.. the hell. I finished for completeness sake.

Command & Conquer 3 (PC): It just didn't agree with me, odd considering I loved RA2 back in the day, Generals and of course warcraft RTS games. I finished it purely because I wanted to see all of the fmvs.

Neverwinter nights 2 (pc): its a mixed kind of forced, the bugs with the game annoyed me, along with its crushing frame rate (lower fps then oblivion, the hell?!?!). I forced myself to finish the game despite how much the technical issues that are driving me up the wall.

Super smash bros brawl (wii): I actually love this game but I _hate_ the space embassy stuff. I finished it to quickly unlock some characters, did vs matches for the ones I missed.

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on the other end of the stick, there are some games I have that I enjoy alot or love that I haven't fully clocked yet. Littlebigplanet comes to mind as half way into the SP stuff I started playing a crap-load of user created maps which I enjoy more :p

I had to quote this.  So...massive.  And to think, I started it all.  I don't think the story was very good either but to me, it's all it had going for it.  I just can't help but love the classic FF combat system.  IMO if I had to rank the FF stories from best to worst (7 through 12 and not counting 11).

VIII/VII/IX/X/XII

Combat

IX/X/VII/VIII/XII

So, yeah, I really had to force myself through. 

Kingdom Hearts. Annoying characters, shitty gameplay (combat, camera, not a fluid game). Thankfully all that was fixed in KH 2 which I enjoyed through and through.

GTA 4 and KH2 I played through half the story but it just bored me so I left them for a couple of months before beating them recently.

Mirror's edge, Buzz and Alone in the dark I forced myself to beat because I wanted some cheap trophies.

little big planet..still can't see the appeal..

Glad i bought motorstorm pacific rift, now THAT game is awesome!

I really had to force myself through Ninja Gaiden Sigma. The story was lame and the gameplay was boring after a while. But i wanted to see if it really was that hard to complete like a lot of people cried, and i paid 60 bucks for it (that was the main reason to complete it). Fortunately the game was not that hard. Enemies were very predictable and it was just a matter of learning their patterns, and even though you had many combo's at your disposal you only needed one move to finish off everything.

Also i had to drag myself through The Last Remnant, which was work related. I had to write a review for it and wanted to complete as much from the game as possible to make a good judgement. Even though i am a big fan of RPG's this one could not get me excited, finishing it really felt like working lol

FF7 never finished it though. was expecting great things from it since i loved the first three there were no cgi movies and a story that brought you in from teh very begging. good thing i only rented the ps one and that game that way i got to take it back after a day dissapointed and disgusted overall with both.