Currently, Suave is my brand of choice. It works well for my hair and you can't beat the price!
Most mornings I workout with my hair in glorified 'top knot' and when I'm done (and typically pressed for time) I'll shake out this mess of a mane I have, blast my locks with the blow-dryer and finish it off with a few shots of dry shampoo.
Okay, it's really more like a cloud of dry shampoo!
And now you have to spill! Are you guilty of heading out of the house masking dirty, greezy hair with dry shampoo? What is your favorite brand?