Well you must love Welcome Stadium then, LOL. Of course that is an extreme example, but it is also one of the worst.
Maybe I am biased, but I think it is pretty hard to find a stadium with better sight lines than you have at St. X. Even down low, given how high up the stands start, are pretty good - although I prefer about mid-way up the center of the home stands.
By the way, the sight lines at The Pit, particularly on the visitor side, are terrible. And while I understand the history and appreciate it, from a pure watching the game standpoint, it is pretty terrible (particularly as a visitor).