I recently switched my lease to a 4 y/o gelding named Major. He's green, but my instructor has agreed to put some miles, as she calls them, on him since she is the one leasing him out to me.
He's a very easygoing, laidback horse... and he is also ridiculously lazy. But, he's also quite the character; he can't resist nibbling or licking you when you're around him. If he was given a human stereotype, my instructor and I think he would be the classic "good boy".
As for his progress, he is fairly good at collecting and extending at the trot, and he's getting better at the canter transitions. We're not aiming for laps around the ring (but we did get 3/4 of one the other night, my second time riding him). I'm hoping that we do good next show season, and my instructor thinks we will. :)
Currently, we're doing five minutes of ground work per ride, which is followed by collections and extensions, and lots of canter transitions. We're also doing lots of suppling and bending exercises.
I'm going down to the barn tomorrow, and possibly today, so you'll get some updates (and possibly pictures!) by Monday.