Love Pepe's! It's chill like eating with the relatives, you can wear your pajamas, and right around the corner from the ladies bar where I met the love of my life, Maximus!
I love this restaurant... it's the only place in Mission where you can drink alchohol with your meal! It's a bit overpriced ($8 for chalupas w/o meat) but the atmosphere is fun and very Mexican, and the location is convenient.