I'm also one of the SLF who checks the lifejacket is there and reads the safety card (partly to see which aircraft I'm on).
In seat Ax a couple of years back I had the temerity to ask where the arrows on the floor were, as it was an airbus instead of the normal boeing, and they were on the side of the left seats, so couldn't be seen from seat A (or B or C). (this was on the LHR-ABZ shuttle)