I think the biggest thing undersold about SOTC was the emotional attachment you forge with the 'characters', that is you, your horse, the mysterious dead girl and the colossi...considering none have any tangible or actual dialogue between one another, you grow incredibly mentally drawn to the colossi, the hulking beasts that I actually felt sorry for.
After years of playing computer games and torturing guards in Metal Gear Solid 2 (you know, shoot out the guys radio, leg and arm and watch him scamper off as you take pot shots at him, just seconds after he begged you not to kill him), I had thought I'd have grown desensitized to game murder...after all, its just polygons. Boy was I wrong after I killed the flying beast here...or scared the little one with fire off a cliff....jesus I never knew I could care so much.
that and when your beloved horse...well I wont spoil it...
its amazing how in most games I couldn't care less about anyone, yet in SOTC, with practically no dialogue and development, I found attachment