Found the Dark Theme on day 1 but not the Select element (first option, chah) and got into the habit of hovering over the code. Happier now.
Diving into Animations as we speak, although I found it in the far right menu > more tools > Animations.
I think the best part of Chrome tools is entering ad-hoc code changes and seeing instant results. I do this more and more to fix issues or try out new things before going back to my code base.