From my spreadsheet of rubs, there are 8 major rub components:
<UL TYPE=SQUARE>
<LI> Sugar
<LI> Paprika
<LI> Salt
<LI> Chile powder
<LI> Garlic
<LI> Onion
<LI> Pepper
<LI> Spices / Other
[/list]
If you pre-salt, you're down to 7. And if you post-sugar and post-pepper, you have a lot of options. Kevin leaves out chile powder as well, so he gets to add another spice.
Staying really basic, and only pre-salting and post-sugaring:
<UL TYPE=SQUARE>
<LI> Paprika
<LI> Chile powder
<LI> Garlic
<LI> Onion
<LI> Pepper
[/list]
So that would be my Five.
My basic rub is these five, with sugar, cayenne and thyme.
The next question is what do you pick from each category?
Under Chile Powder, you can select, for example:
<UL TYPE=SQUARE>
<LI> generic
<LI> ancho
<LI> chipotle
[/list]
Under Garlic and Onion, you can go with powder or granulated.
Under Pepper, you can select, for example:
<UL TYPE=SQUARE>
<LI> black peppercorns (for peppercorns, grind to your favorite consistency)
<LI> coarse ground black pepper
<LI> ground black pepper
<LI> ground white pepper
<LI> green peppercorns
<LI> mixed peppercorns
<LI> crushed red pepper flakes
[/list]
For completeness, here are the options in my spreadsheet for sugar:
<UL TYPE=SQUARE>
<LI> sugar
<LI> dark brown sugar
<LI> light brown sugar
<LI> turbinado sugar
[/list]
And here are the Spices / Others
<UL TYPE=SQUARE>
<LI> cayenne
<LI> cumin
<LI> dry mustard
<LI> Accent
<LI> bay leaf
<LI> celery salt
<LI> celery seed
<LI> coriander seeds
<LI> cumin seed
<LI> dried marjoram
<LI> dried thyme
<LI> dried rosemary
<LI> ground allspice
<LI> ground celery seed
<LI> ground cinnamon
<LI> ground ginger
<LI> ground oregano
<LI> hot red pepper sauce
[/list]