Wow this is super weird, I was just thinking this exact same thing about myself, spacing out and mulling it over in front of my computer screen, then I refocused my eyes and this was the next comment and I read it.

Crazy. I'd love to know what the answer is though, for real - what would we be classified as?

I experience things exactly as you said - for me it's about a balance. Sometimes I have been out too long doing whatever with people, hanging out, drinking etc and I want some time to take a break, get a glass of water, and get some work done. And sometimes I have been getting work done for too long and I need to be out and see people. It's a very strong urge on both sides, and the ideal spot is right in the middle.