@ Pow-wow and Tophat320,
Thank you for taking the time to answer gentlemen.
As a matter of fact, thought the A320 is a really comfortable plane to fly, I couldn't be happier to convert to 747-4/8F and plan my career at CV, bearing in mind of course the drawbacks of the lifestyle associated to it.
Regarding the dress code, I echo Pow-wow's opinion, rather overdress than the opposite, even for a long day of medical and psychometrics (though no need for a pocket square matching the tie
).
All the best!