Based on what is going on right now, not what has happened the past 100 years; CA has to be a clear #1, SoCal might be #1 by itself. After that TX and FL.
AZ and particularly the Phoenix metro area deserve a lot more consideration then it's been given so far. Look at recent drafts, the burgeoning population, the year round programs, the number of ex-pros coaching and the # of top flight facilities the kids get to play on.