I used to work a compressed week and started taking Monday but eventually it moved to Friday. When I took Monday off I felt like I had to pay for it with the next four days, when I took Friday it was like I was being rewarded with an early weekend.
I love using Wednesdays to clear leave (I know, not the best day in terms of utility for holidays and stuff) as you essentially create a new Friday. Work is so much more bearable.