It's just that F5, or any structured program, has progression laid out for you, so progress is more consistent and easier to track. Not sure what PPL you are on but if you only did 1 year of F5 you...
I used to love reading, 1 book per week usually, but it's been years since I read for fun. Everything I read now is work related sht, been meaning to get back into reading but just never feel like it.