I generally look at most places when i know the regens are created, the best players i can find only have a 2.5 star rating, sometimes 3 if im lucky, but don't look that impressive.
Large database.
England, Spain & Italy loaded.
I know it's early, but on other games where i'm 5+ seasons in, still getting same results.
but i'll keep going on this game and keep you updated season by season.
Another question, other than the obvious Brazil, Argentina, Spain... what other places have good regens?