Here's one the Boss found,a good all around rub that you can add anything to
or to anything.
1/4 cup firmly packed brown sugar
1 Tbsp kosher salt(or sea salt)
1 Tbsp paprika
2 Tbsp each of garlic and onion powder
1 Tbsp chili powder
1 tsp cumin
1 tsp oregano
Have used on chicken,pork and beef with good results.
Good generic rub...but for a little added "spice" add some chipotle pepper powder. I use dried and smoked Habenero pepper...but just a touch or as much as you want depending on the heat level you want.