Its really hard for me to admit when I die in games like VI-VIII or X. I've always felt these games were pretty easy, so usually when you die its cause you made some fatal mistake that could have been easily prevented. So basically its all human error and has little to do with the boss being difficult.

I died 3 times my first time through VII. Once each disc. In the first, I lost to Missing Number cause I was completely unprepared and my usual habit of never using magic caused my downfall.

In the second disc, I lost to Carry Armor. He grabbed my two party members and killed my third character cause I generally refuse to use items after a certain point in the game and CA had a hold of my healer.

In the third disc, I lost to Sephiroth cause frankly I didn't really try and was basically just sitting back and seeing what he could do. When I realized how close I was to getting knocked off, I tried to save myself but got taken out cause I waited too long. My rematch with him was as one sided as a fist fight with a paraplegic baby.

I don't even remember the Demon Wall or Materia Keeper in this game...