I'd have to go with GR18. I'm currently using his roster and franchise files, and, to quote a famous tiger, thheeeyyyy'rrrrrreeeeeee GREAT!
I tried out JSOU's files and, WOW! The guys he plays with must be spectacular. I just couldn't do anything at all. It was weird at first. Everything was at 100's almost. I figured out why that was, after reading through his threads. But just, WOW! I'm not at that level again yet. I just started playing again after not playing since mid 06ish.
Also, tried out FunNGun, and they were also really good, but for some reason just found myself going back to GR18.
Like I said, no knocks to anybody. As a matter of fact props to everyone for keeping our game going. GR18's files just fit me the best.
Thanks for all the hard work guys.
I'm doing my research and getting familiar with Finn's program, and maybe I'll have out my own file variations next year.