As pax (or SLF if you prefer) for over 30 years I always pay attention to the safety briefing. Apart from the obvious safety knowledge aspect it shows courtesy to the FA giving it. It doesn't matter if you have had the same briefing many times before and it only takes literally a couple of minutes of your time. I would think that any normal person with a normally polite demeanor would do the same. The others just don't matter (unless they get in my way should there be an emergency
).
The comment from Final 3 Greens, I think, refers jokingly to the spelling of "taxiing." Taxing is something completely different as he implies. (I think some spell it "taxying" which is still incorrect).