Starlancer: Last level = Hardest Level Ever! I just couldn't do it. Fun though. I recommend to anyone who likes Freespace.
Dungeon Keeper 2: Couldn't concertrate enough near the later levels. Too hard/repititive
Temple of Elemental Evil: I really really want to like this game. It's got great graphics, I love the turn based combat (brings back memories of the Goldbox series), the story was there, but the NPCs are boring, quests evolve to much backtracking, the interface appear to be unfinished ie: Having to manually put a flag on the map so you can remember which building it which. Not having enough information in game about the various feats, and skills. I've played BG2, and NWN enough that I have a idea about alot of them, but not all, and a PDF manual sucks. Maybe I should go dual-monitor. It should have been a fantastic game.
Ultima 9: I liked the freedom of the others ultima (even U8), but this one leads you by the nose ring commonly used to lead bulls.
Giants - Citizen Kabuto: Too hard. Building a base, while hunting foods, hunting Smarties, killing bad guys (takes most of the time) is incredibly aggravating. Still a fantastic game though.
Nox: Did everything but kill Hecubah. Just never around to it
Clive Barkers Undying: Mansion was freaky. Rest got a bit boring.
Thief - The Dark Project: I didn't approve of undead in the game. I only ever got toplay that late at night in the dark. Kinda creepy.
Pools of Darkness (Goldbox 3): I just couldn't do the last fights about the Balor (or Balrog). I beat the dragons. Beat the beholders. Had only one character left to kill the Minions of Bane, and the Balor himself.
Black and White: Micro-management. I try to be a good god, but my theory of "If you worship to the point of starvation you're a bloody idiot." and so i ended up red and veiny. Though my cow was white and glowing ....and fat.
Actually I could probably name just about ever I've ever played :p