I've had it go either way. Sometimes we have gotten atleast one of our requests (I'll usually make 2), and sometimes we get the absolute opposite of them!
With the garden/pool view, we usually end up facing the quiet pool. Most of the time the view of the pool is blocked by trees, but generally you get a good view of the canal and Swan/Dolphin or Hollywood Studios.
Otherwise, you could have a view of the main pool (be careful of noise from the afternoon pool activities) or the croquet lawn/canal. I'd rate all of the views to be about the same.