I created the word "zeithound" to describe myself.
I have often joked that I best understand people when I figure out what kind of dog they would be. Not, "oh, he's definitely a beagle!" type of distinctions, but groups of dogs have certain traits. Using this lens, I know that I would be a sighthound. There isn't much middle ground for these dogs. Sighthounds are either running or relaxing, they either love you or they don't, and they instantly pursue anything fascinating. They form strong opinions about people & places and they can be a little stubborn.
I embrace my sighthound qualities, and also wanted to refer to my challenging relationship with time. I often lose track of time when I'm in hot pursuit of my current prey. So if you forgive the play on words, zeithound suits me perfectly.