In a small bowl, mix chile powder, cumin, salt, cayenne pepper, and cinnamon. Lightly brush the fish fillets with vegetable oil and apply rub all over the fish. Cover with foil and refrigerate for 10-20 minutes. Prepare grill for cooking fillets with direct high heat.
In a medium size bowl, combine red cabbage, cilantro, sugar, olive oil, chipotle peppers and salt and toss to coat.
Grill the fillets over direct high heat. Place fillets skin side down and grill for about 4 minutes and then flip and grill another 3 minutes. Remove fish from grill and set aside. Fillets should be opaque in the center and an internal temperature of 145 degrees should be obtained. Warm tortillas over high heat for 20-30 seconds and flip once.
Assemble fish tacos. Break fillets into large chunks and place on tortilla. Top with red cabbage slaw and avocado slices. Roll tortilla and serve.
ENJOY!!