As a "four strings forever" person, I really enjoyed reading the OP's and others' takes on why a five-string feels natural to them. I particularly like the arguments about symmetry, which make sense to me. And I like the variety of reasons that people have. More options for positions (and for staying in a position) is cool. It sounds like it is more than just the low notes for many, though the low notes are also cool.
I'll never be converted, but thanks for helping me understand all you "extra string" weirdos
! ("Weirdos" in the most respectful sense 
I'll never be converted, but thanks for helping me understand all you "extra string" weirdos