1. Dagoth Ur - TeS: Morrowind - I never followed the story, but I had leveled and geared my character like crazy. One time I decided, why not just head to the final boss since everyone keeps telling me where he's located. The fact that he greeted me and didn't attack until I attacked him freaked me out, though since he's a god why should he care. I wasn't able to defeat him, and had to retreat. I think I killed him once through an insane number of potions and spells, was anti-climactic without completing the story though... one day...
2. Gohma - Ocarina of Time - It's still my most memorable boss in Zelda (besides Ganondorf), pretty much a staple of Zelda games: play a dungeon, get new equipment, use equipment to kill boss. I loved the opening sequence announcing each boss and their names before each battle.
3. Yuri - Red Alert 2: Yuri's Revenge - The villain I always envied. His unique units and buildings created the perfect triangle of playable 'races'. Only thing that I felt ever rivaled Starcraft.
4. Sin - Final Fantasy X - Not really a memorable boss, but I still remember it to this day and I was pretty young when I first played it. The game wouldn't have been complete if I was chasing down some guy (though you were at one point, but Sin was still the main boss).
5. Lucien - Fable 2 - I love not having a challenge, makes games worth playing.
2. Gohma - Ocarina of Time - It's still my most memorable boss in Zelda (besides Ganondorf), pretty much a staple of Zelda games: play a dungeon, get new equipment, use equipment to kill boss. I loved the opening sequence announcing each boss and their names before each battle.
3. Yuri - Red Alert 2: Yuri's Revenge - The villain I always envied. His unique units and buildings created the perfect triangle of playable 'races'. Only thing that I felt ever rivaled Starcraft.
4. Sin - Final Fantasy X - Not really a memorable boss, but I still remember it to this day and I was pretty young when I first played it. The game wouldn't have been complete if I was chasing down some guy (though you were at one point, but Sin was still the main boss).
5. Lucien - Fable 2 - I love not having a challenge, makes games worth playing.