It depends on what you're looking for of course. I 2nd the Citron & also recommend Xyclo (Asian infusion) on Piedmont. The rolls & sauces are insane. I also recommend BaVo (vietnamese) near e Tribune building - the spicy coconut curry rice dish with chicken & the prawn appetizer is my fav! If you're willing to go to Alameda don't miss Burma Superstar! Yum!!!
Oakland has some fantastic restaurants. One notable place is Citron, a fusion of French, Mediterranean, and California cuisine. In the mood for authentic Italian food? Check out Il Porcellino, known for its family dining and fantastic tiramisu. If seafood is more your style, don't miss Kincaid's Boathouse, which also features delicious steak and chicken.