Just curious which everyone prefers?

Gin Fizz
(http://www.coolcocktail.com/cocktail...RecipeName=Gin Fizz
Cocktail)
or
Gin Sling
(http://www.coolcocktail.com/cocktail...RecipeName=Gin Sling
Cocktail)

I'm more of a Fizz, until I get a few in me, then it goes to the Sling.