Indeed, we're all different and that's the beauty of the trade, you can tailor it to suit yourself. For example, one of the reasons I work evenings is to keep myself from pouring alcohol down my neck although, in recent times, I have found that I have to go home earlier than I'd like simply because I'm tired, to the extent that I'd be in danger of falling asleep behind the wheel... I'm not as young and certainly not as fit as I used to be... back in the good old days I could do 18 hours of a Saturday with no bother, in fact I couldn't sleep without a drink... these days I need to drink a strong coffee to stay awake past midnight!