Re: How many types of surfaces have you actually played on?
Hardcourts and Green Clay. Here in the US it's really hot and all they have is outdoor hard or green clay
My only favorite green clay is in Florida, during the summer, because it's a surprisingly medium paced surface. The Florida Tennis Center's HarTru tennis courts are so easy to slide on that I've taken my fare share of falls. It's like ice sometimes. But it's beautiful surface when it's loosely packed and not like freaking sand dunes on a concrete surface.
Played on red clay in France, Italy, and the IMG Academy in Sarasota. The first two were so fun...felt like Roland Garros. The IMG Academy red clay court didn't behave right because it was in humid Florida, which answers the question as to why there's hardly red clay in the states.
Serena , Venus , Petra , Ana 
Simona, Vika , Angie, Sveta, Garbiñe
Kim , Mahree , Monica , Dokic, Sandrine, Jie