Yeah I like it to completely get lost in details and the cool thing is about long time projects you end up with something you didn't even know you could achieve.
I can relate on the "check off the list" only the list gets bigger lol. But yeah I really need to learn to do more sketching and practice. Often when I do sketch I get all those ideas and end up creating new artwork instead of practicing. So I guess I practice mostly when working on art :)