My favourite day for playing tournaments, as weird as it may sound, is Monday.
I honestly don't know why, but on Mondays, I really enjoy playing. Not just because the field is softer since most of regs are resting after their Sunday grind, but it seems that the environment at the tables is better.
Players chat with each other, and they are quite friendly. And since fewer people are playing, the variance is lower. So irrespective of whether I had a profitable session or not, I still end up in a good mood after Monday sessions.
Too bad I don't have free time to play on this day often, but when I do, you can always find me grinding))))