It's always fun to hear live music on the Mall. Eat some interesting cuisine (well, maybe not from Wales this year, although the other exhibits are lots of fun) and get a chance to see some visiting artisans in action.
This year's festival seems a bit disjointed, however. It's definitely smaller in scope - it seems to take up less National Mall real estate. And as usual, there is a Latin American component. Not sure why that always seems to be the case.
But it's hard to complain when the Incan rotisserie chicken was so yum.