I used to have a very good weekday schedule, lately I only seem to make it on the weekends. If you are an MTT player, I do not think there is much of a difference. Cash games really seem to be good on weekends, maybe because some amount of alcohol may be involved. This can go either way, a juicy game means big wins and unfortunately big losses. You have to really be in control of your emotions.
I play more on weekends because I have more free time and more interesting tournaments. However, if there are good tournaments on weekdays after work, I don't miss the moment.
I play daily. Weekends I am probably more focused especially late afternoon early evening. If you are a night owl tables seem to be a little less stressful.
It depends! But Sunday is always the day with the most tournaments and therefore the biggest payouts in online poker. This might make it one of the best days to grind at least for me.
I prefer to play during the week, but also play some on weekends. I feel like more people that are just learning play on the weekends but that could just be me.