Interior mexican - Fonda San Miguel
If you are in domain, then goto Velvet Tacos. If you want to venture out,then torchy's and Vera cruz are pretty awesome.
Italian - Nothing good really but North Italia (domain) is alright.
BBQ - Salt lick, although, it is a drive out of the city or to round rock. Frankins BBQ is awesome and crowded. I like Stubbs BBQ in downtown as well.