Here's a tip that a chef taught me...taste the rub first. If you don't like the way it tastes before you put it on you're not going to like it cooked into the meat! Trust your taste buds!It would be nice to be able to get a spice blend flavor without smoking all day just to be disappointed in the end.
Do you want sweet or would you prefer strictly savor?
Here is one rub that will never fail....SPOG - Salt, Pepper, Onion (granulated or powder), Garlic (granulated or powder) - just mix a TBS of each and viola'