For me its Pool of Radiance.
What you are thinking as the game progresses:
"Cool, a zombie is coming at me, lets kill it"
"Wow, another zombie, this game is great"
"Huh, I must be in a zombie lair, there's"
"Two more zombies now?"
"Come on, another zombie!"
"This sucks, a zombie, are there any other monsters?"
"Time to uninstall the game"
That sums it up, and thats what I did. Never finished the game.