I tend to go with the "one size" that Jesus recommended:  "whole heart, soul, mind and strength."

The "narrow gate" is one of those teachings of Jesus's that progressives ignore. 

'The personal Cross?  Oh, Jesus did that for me.  I am an Amercian, ya know!".

Even though Jesus specifically spoke about the personal cross for each one of us "daily". 

The real Jesus was just too demanding for the comfy Americans whose belts groan from opposing forces!