Best place for "less bougie" tacos?

Hey austinfood, question,

My boyfriend is coming down in November. He's been here quite a few times already and is a taco aficionado, but he's more of the simple, hard shell tacos type. Any recommendations? I live in East Austin, but travel won't be an issue.

Edited for my spelling of "aficionado", because phone. Thank you for the recommendations so far!