Dave, thanks for fixing the link!
Never feel bad about refusing an RNAV, I’d much rather extend you downwind an extra 3/4 Miles than make you rush an RNAV when you’re tired.
Of course it’s a little different when it’s busy but even then, if you don’t fancy the RNAV the guy behind will probably do it an you’ll get a spin.
2/3 minutes on to a flight isn’t the end of the world.