Hard to choose. I like all the prints in Zucca, but of the ones that are more readily available at outlets or on eBay, I'd say Paradiso or Inferno. But L'Amore is also lovely in Zucca. Gee, I guess I am not much help. I love them all too much to choose just one!
my vote goes to spiaggia too. though i don't have one... seeing some of the spiaggia zucca pics. here and IRL just make me go speechless they some have of the most perfect placements on spiaggia zuccas!
in fact, i think spiaggia looks its best on a zucca.