Completely agree Dustydreamnz, we all have our preferences. Personally, I prefer sires that appear to throw dominant traits into their offspring. For example, Awesome Assassin threw size, and strength, (it was rare to find an Awesome Assassin sprinter), Token Prince threw strength and ability, but some of the more "erratic" (inconsistent) dogs going around. Hotshot threw speed and the unwanted ability of cramping and plenty of dogs with horrible kennel manners (Hugo Agogo nice runner, but not the nicest in the kennels).
I think if you can see traits in a sires offspring that you see missing in your broodbitch, then that is the preferable way to go, try and breed those traits into your "line."
However, this is coming from a guy who is still waiting for his little "darling" to come in season so that I can have an interest in breeding for the first time, so take from my opinion what you dare:)