Types of Goal Line Defenses

Coach,

I have asked around to other coaches and a majority of them also like the 6-5.I initially gravitated towards this one (not sure why).However, I searched and searched and couldn't find any material, so I moved onto some other schemes.

For some reason, I am feeling a little overwhelmed with the goal line defenses.This is because with the normal defenses, there are pretty specific in differences, and youre going to figure out pretty quickly if using a particular one is a "no" or a "go" (at least that's what it seems like to me).

With goal line, I can't seem to choose any one I like over the other(s) because they almost all seem the same.