Toss shrimp with oil, chili powder, cumin, garlic powder, paprika, salt, and pepper; taste and adjust.
Cook shrimp in a skillet 2–3 min per side.
Whisk sour cream, mayonnaise, lime juice, and hot sauce; taste and adjust.
Warm tortillas in a skillet or microwave.
Assemble tacos with cabbage, shrimp, tomatoes, onion, and sauce.
Serve on a white ceramic platter with cilantro, margaritas, and guacamole.