Bay has that kind of trot too. The suspension time is so long it's even awkward to post it:
Up....[lookaround]......down....[nap]....Up....[lookaround]......down....[nap]....
I rode an Arab that belonged to a friend one time that had a trot like that. I was thinking about buying him for a CTR horse. I couldn't imagine riding him for 40 miles. The Arabs I had had nice trots.
The QH's I've rode all have easy trots to post too. Not so springy.
Rusty's long trot, is like floating, takes very little effort to post it. Harley's is a little springer, but not bad. Rocky's is OK, but being short legged, he's rather short strided, so on him, its' updownupdownupdown....:)
Becky