I don't know why, it's the same reason why you like some music and you don't like others. There's something about it that you like. Ultimately I don't find it's in my best interests to try and analyze it, since it's fundamentally emotional.
“The Missouri is, perhaps, different in appearance and character from all other rivers in the world; there is a terror in its manner which is sensibly felt, the moment we enter its muddy waters from the Mississippi.”