Let's see.
Auggie is not very high strung, but is equally happy to be super active or a little lazy. His default mode is to be in a pleasant mood, he loves just about everybody he meets, is super outgoing and makes friends fast. He picks up on new things fast and is a "thinking" dog, trying to figure out new ways to do old things better and faster.
I don't know if every single day I would describe myself as "not very high strung" (I like to THINK I'm pretty low key, but apparently that's just because I've successfully suppressed my anxiety disorder to the max...) but yeah, everything else is pretty close. I also don't know if I'm a thinker as much as Auggie is... no, wait... yeah, yeah I am.
Maybe that's why I'm drawn to of particular TYPE of sheltie - the oldschool type that is like Auggie - and why I reject the soft, sensitive type of sheltie that is common now..? Huh.