The only time I make my own rubs are when I'm not going "traditional" and am using spices/herbs that are more normally found in Asian/Mexican etc... dishes. There are just too many really good commercial rubs available like Simply Marvelous, Oak Ridge, The Rub Co. and BigButzBBQ just to name a few of my favorites.
Guerry >^..^< Pit Beeatch for Team Munchkin
Avatar by Northwest BBQ
"If more people would just open their minds, more people would learn things." Wampus