Once you play a game that uses it with it you can't go back
I played MHFreedom on it's release and played all the psp versions since. I played MHTri since release (w/classic controller pro) and can still pick up the psp versions with little to no problem.
Now I do prefer a second stick to adjust my camera but after 500+hrs across the psp versions learning to using my left index finger on the D-Pad while moving/attacking its not hard for me either way. --- GT: J03HIG45HI PS3/Vita: JoeHigashi2000 3DS: 0817-3804-7210