The low head and slow lope is desireable right now.
It shows relaxation and control. However it's important to remember with the lope that it's all relative; A slower lope allows you to have slower fast circles as well if you don't feel confident enough to go fast. For me, my mare has a little quicker lope so our large fast circles we have to haul some tail to keep the speed relative. It's not like our small circles are fast, they just aren't pleasure-y like that colt. Plus, if you have a pleasure lope, and you come from that large fast right down to that slowest-of-the-slow...It's impressive. Big time impressive for that big of a change with a small cue. Not to mention slower lopes are easier to sit.
To an outsider, the low headset is easy to target and bash. It gets kind of annoying...lol. There's nothing I love more than a colt who is good in the head. They don't all have to be dragging in the dirt, but some do it naturally. Others just have to know how to soften up to wherever they are comfortable. A head in the air not only looks bad but it takes away a lot of the horse's finesse, roundness, and stopping power. They can't break in half and slide if their head is in the air.
All in all, that is a colt I would buy. He is calm, low leaded, and willing.
Pssh.I didn't pick up the wrong lead
It's called a counter canter...
...A very advanced maneuver.