Somewhere around here, I posted some enchilada sauce recipes last year or the year before. I don't (can't) buy store-bought sauce. I make my chili powder too, which you can play around with and gives some interesting flavors to the enchilada sauce. Cumin, garlic, cayenne pepper, and oregano are the basic ingredients, and when you mix up the type of pepper it can really get interesting. Give it a whirl, since you enjoyed making your own enchilada sauce! Have fun!!
ETA: and paprika, too. :)