I say "sprawling", because the houses are not tucked into one notch in the seaside cliffs as Amalfi town or Positano are. There really isn't a central piazza, as other towns have. There are parallel streets clinging to the broadside of the mountain, connected by hairpin turns going up, up, up the cliff side. This is what real Amalfi living is like. The local taxi is a golf cart. You need a very small car to navigate the streets here. Hold your breath if a bus tries to pass. There is a surprise at every turn... an alimentari (grocery) here, a bar-tabacchi there, then suddenly a duomo... with dramatic views of the sea from everywhere.
Another unique thing to look for in Praiano is the art. It is literally everywhere. Painted walls, tile murals, ceramic sculptures... they are all over the town in unexpected places. Praiano has a reputation for being very artistic and a bit eccentric. Enjoy their passion.
All in all, if you're going to stay on the Amalfi Coast for more than just a few days, staying in Praiano would be a great way to really experience the Amalfi lifestyle, without having to put up with the huge tourist crowds in the more popular towns like Positano, Amalfi or Maiori. It's also central enough to be a hub for exploring the Coast Road, Naples, Vesuvius and Pompeii.
So, if you want to buy some colorful ceramica, bottles of limoncello or just soak in the sun while staring at a sea view from your balcony, try either town... they are both worth the trip. The Amalfi Coast is one of the most amazing places I've been... ever.