BTW, Windexed, most of my dislike for Ninja Gaiden stems from the fact that someone (my brother or the son of my dad's girlfriend) saved a game on level one over my game on level six. Right as it was getting interesting, I had to start over, and it was sort of a turn off. That and the fact that it is too freakin' hard to only play every two weeks and expect to be anygood.
PoP-SoT outdoes Gaiden in navigation, better wall-running... stuff like that. But the combat is relatively easy and just as repetitive, maybe more so.