I usually like boss battles, especially difficult ones. It makes the game fun because it tests yours limits. What I DON'T like is having to watch a long cut scene over and over if you lose or having to go through an extremely time consuming level again. IMO that just takes away from the fun.
Now Playing: The Witcher (PC)
Consoles Owned: NES, SNES, N64, PS1, PS2, Wii, Xbox 360, Game Boy, DS