Keens! DS loves them and they look much nicer than Crocs (although I think Crocs on the little ones look cute).
My husband wears Keenes and he spends a whole lot more for them than for the Crocs I've been wearing just as long. His Keenes are just as ugly as my Crocs - I hate the rubber tips. He says they are comfortable. I say I'm more 'comfortable' spending $20-$30 a pair than $89-$139 a pair.