[QUOTE
EDIT: Almost forgot about the thickness. In general, the shaft is widest at the base. I've seen one that got skinnier at the base and it looked like a corndog. That was weird. I just kept thinking to myself, "He'd better get some engineers in there to stabilize that shit before it falls off."[/QUOTE]
The most perfect one I ever saw was perfectly straight, not very dark and about 10 inches long and(making a fist here), maybe 2 inches +/- thick(top to bottom)?. Head wasn't overly larger, just enough so to give it that profile. That's the technical end of the response.
The personal side of the response, one that's attached to a terrific owner. That's not necessarily the one who's on the other end of above visual.