Man, I am going to get a lot of hate probably, but:
Ocarina of Time
I tried to, I really did. But at that time halfway through the game I completely lost interest in it. Despite finding the beginning to be good the game never felt magical to me. Instead, Soul Reaver was the Action Adventure I really lost myself in.
Red Dead Redemption
After GTA 2, San Andreas was the last Rockstar game to truly excite me. I have accepted that but I really really wanted to like RDR and I just didn't.
I never got to play it when it came out so I got the PS3 version. It just feels so archaic it's unbelievable. I forced myself 7 hours into it but then I realized I was working on and not enjoying the game.