Do I wish that everyday were a Friday?
Probably not, then I'd have to work every day of my life. Fridays are defined by their Saturdays and Sundays, so an endless repeating stream of Fri/Sa/Sun, then? Nah, Fridays would take on a Monday like quality, and I don't want to give up my Friday feeling. Optimal week plan? Monday, Friday, Saturday, Sunday, and repeat.
This also significantly increases your number of weekends before you die, and makes work-play division a very fair 50/50.