I really enjoyed breakfast at Boma. A few more interesting choices on the buffet than your typical WDW breakfast, and if you are able to make a morning of it, the lookout makes for a fun place to explore.
1900 PF was also a fun breakfast, even though the food is nothing particularly special. We had a late seating in a mostly empty restaurant, so the characters can let their hair down a bit.
I think Crystal Palace works a bit better as lunch than breakfast, personally.