For me it's Saturday and Sunday guarantees for tournaments increased more players of course, and more professionals play .but also more poker fans play tournaments on Saturday and Sunday
My most favorite day is Sunday! Yes, because Sunday is usually when the biggest tournaments (such as the Sunday Million, for example) are held. I can't say that I play in these big tournaments all the time, but the atmosphere at the poker tables on Sundays is... special. More dialog in chat, more emotions of players.... But, in general, every day in poker is a good day in its own way.
i like to play ring games , sngs ,and MTTs on the weekend when there are lots of casual, carefree players and i like freerolls during the week because fewer people enter .