Great answer MH18! It helps me to see others with the same idea. I have become more aware of hitting bordom and the need to move on rather than mastery to keep me interested. I also make decisions based on what type of guitar player I want to be. For instance if I don't like finger picking style I am much more inclined to go for that 80% mark on that lesson and focus more on strumming or whatever.
I am in the Accoustic section of advanced and found myself in a rut of bordom trying for weeks to get up to speed with finger picking. Just yesterday I picked up the electric and jumped into Rock section. So far enjoying the heck out of it. My study now (Finger picking, song study with strumming, Rock section and scales) Now I can't wait to play everyday again.