All depends what you want? Wagamamas great for informal Jap/Thai stuff, as is Tampopo.
Pau Brasil is great, food is FAR from boring as someone else suggested it might be. But, it IS a veggie's nightmare.
El Rincon best tapas in town. Croma has limited menu, but what they do they do great. And it is classy for a low price.
Samsi is amazingly authentic Japanese. (It ain't all sushi!)
Anyone tried the Brazillian food stall in the Arndale Food Market? Fine for a quick lunch, (and Elano was there bit ago.)
The Knott Bar does fantastic food too.