What kind of Mac do you have? My “power down” habit was learned from my PC days, where my laptop would slowly burn down battery on sleep/hibernate, combined with the slow degradation in performance from extended sessions.
I get it! I haven't used Macs much, mostly windows and linux, suspend/resume is really funky on windows for me. Linux was pretty much instantaneous when resuming on my ThinkPad.
I also didn't lose much battery life, probably 5% overnight-midday.