My polka dots are everyone's stripes, apparently. I love polka dot everything.
Bright colors, but especially blue.
Ditto PP who said vintage and vintage-inspired stuff.
Also for you stripes lovers, I just got these and I CAN'T WAIT TO GET THEM DELIVERED!! They also have a heeled version (and lots of other colors, the red is nice) but I figured I'd get more use outta the flats.