Oh my. So many possibilities, here. Let's see...
My all-time favorite 100% Love You Forever gaming character would have to be...
*drumroll*
MINSK! COME ON DOOOWWWN!
The man is a ranger/fighter who recognizes his own lack of intelligence and still manages to kick ass, take names, and do Right in the world. And he has the greatest animal companion ever, the Miniature Giant Space Hamster known affectionately by one and all as Boo. GO FOR THE EYES, BOO! GO FOR THE EYESSSSS!
There are, of course, several honorable mentions that must be addressed.
Jim Raynor and Kerrigan from the Star Craft series.
-"Call me Jimmy."
Caleb, of the Blood series.
-"When you get to Hell, tell 'em I sent you. You'll get a discount."
Pretty much every other character from the Baldur's Gate series.
-"We're all going to die..."
Pretty much every character from the Mass Effect series.
-"I am the very model of a scientist Salarian..."
GLADOS from Portal.
-"This was a triumph..."
The Postal Dude, from Postal 2.
-"You've gotta be f@#$ing kidding."
Dev/Null, Vampire the Masquerade: Redemption.
-"Real life? The life of Rhea? I loathe real life...whatever that is. I sacrifice it on the altar of my altered state! Or was that the life of Rhea? Or her sister? Or her cousin? I forget..."
Edit: One more that demanded I add him, or he'd make all of my valuables vanish and beat me over the head.
Garret, the Thief series.
-"The Jacknall's Paw. Well, I guess he doesn't need it anymore."
There's so many more, but this post is getting long enough as it is. To all those epic, memorable video game characters I missed, I salute you!