One small thing I want to add is that as someone with many hobbies and goals not related to my job I love the idea of getting X amount of work done and then being done as early as 2 or 3.

Those extra hours to make more progress on whatever personal project(s) I'm working on at that time keep me motivated and, more importantly, happy. Which means I'll enjoy doing my actual work more (or just tolerate it better) and you'll probably get better results from me.