Make the chipotle lime crema first so the flavors have time to come together while you cook everything else. In a small bowl, stir together the sour cream, minced chipotle pepper and adobo sauce, juice of one lime, and a pinch of salt. Taste and adjust — it should be smoky, tangy, and slightly spicy. Refrigerate until ready to serve.
Make the quick slaw. In a medium bowl, combine the shredded red cabbage, sliced red onion, juice of one lime, honey, a pinch of cumin, and a pinch of salt. Toss well and set aside — even five minutes of sitting in the lime juice improves it significantly. The cabbage softens slightly and the acid does flavor work that raw cabbage can't.
Pat the shrimp completely dry with paper towels. This is the step that determines whether you get a proper sear or steamed shrimp — wet shrimp creates steam in the pan and you'll never get the char. In a bowl, toss the dried shrimp with the smoked paprika, cumin, garlic powder, chili powder, remaining salt, and black pepper until every piece is coated.
Heat the olive oil in a large skillet — cast iron preferred — over medium-high heat until shimmering and just starting to smoke. Add the shrimp in a single layer. Do not crowd the pan; cook in two batches if needed. Sear without touching for 60 to 90 seconds until the edges turn pink and the bottom has a slight char. Flip each shrimp and cook another 60 seconds. Shrimp are done when fully pink and just opaque — they curl into a loose C shape. A tight curl means overcooked. Pull them off the heat immediately.
Warm the corn tortillas. The fastest method: hold each tortilla directly over a gas burner flame for 10 to 15 seconds per side using tongs until lightly charred in spots. No gas stove: heat a dry skillet over high heat and warm each tortilla for 30 seconds per side. Wrap in a clean kitchen towel to keep warm and pliable while you assemble.
Assemble immediately. Spoon a generous amount of slaw onto each tortilla. Add 3 to 4 shrimp. Top with sliced avocado, a drizzle of chipotle lime crema, and fresh cilantro. Serve with lime wedges on the side for squeezing over everything at the table.