When it comes to printing exposure times I try and avoid odd numbers. I realise this is a bit strange, as sometimes the correct time may require an odd number of seconds or points of a second. For example a print exposure that may require 5.3 seconds I would prefer to print at 4.8 seconds and perhaps over develop slightly. This is perhaps an extreme example, as I may alter the aperture to put it more in line with even numbers. I know this is strange behaviour, but do others suffer from similar number/behaviour preference?
I avoid fractional aperture settings. I prefer to work in the time domain. Easier for me to multiply the time by 1.26 for a third stop than try and guess f6.3 on the aperture scale