Thanks for your inputs. Am accumulating miles for Intl BF reward as I think (and learned from here) it gives the max value per mile.

Though have 400K miles, simply could not muster the courage to blow 50k hard earned 20 hour grueling trip miles on a short 4 hour FLL flight so went ahead and spent my last 50k cleaning out (pretty much) my AA balance.

That said what is the sweet spot for in terms of cents per mile where you get the most "bang" for the buck? Is it 2 cents per mile, 3, 4, 10 per mile? Any thoughts on this?