marks and spencers are the best - but theyve stopped doing my fave opaque ones!! grr!
i have to wear them proper high over my flabby bits

as to whether its inappropriate to not wear them...i mostly wear them unless theyre all in the laundry and somestimes if its hot or im in a rush.
for outcalls i often wear tights on the way then ask if they would like me to change into stockings - they often say 'nah love dont bother'.