To be fair, AJ's family is the best.



Dash's family in my opinion gets second spot (they lose some points for their stalker factor),



I think Fluttershy's family gets third spot for their incredible cuteness and peaceful personality (Fluttershy is the bold one of the family, lol).



Pinkie's family is a mix bag for me, while Maud Pie is great, the rest of the family didn't impress me all that much, Twilight's family got some spotlight and the mother showed an adventurous spirit. So for me they both draw for forth spot.



Rarity's family is least impressive to be since they never got their own episode. There's still so much we don't know about them.