Poll to follow!
My favorite day of the week is Saturday, because it’s my only day off that is followed by another day off. 
Mine too, particularly around 8 AM, when I’m just sitting down with coffee and a bagel, and there’s 40-odd hours of unscheduled activity (or idleness) ahead.
I’m a shift worker whose days off vary from week to week, so I ticked ‘varies’ because my favourite day is also the first day I have off. This week, my favourite day is Friday.
(stoopid typo)
I don’t really have a favourite. I like different things about different days. I used to hate Tuesdays because I had a long day of class on that day, but I’m not in school anymore.
Saturday. No other day comes close. Well, OK Sunday comes close, but I can do what I want on Saturday night: drink whatever I want, and not worry about the repercussions the following morning.
Saturday is a weekly mini-holiday.
I voted Tuesday because I get more work done that day than any other. Since I work from home and am on my own schedule, weekends are kind of meaningless to me EXCEPT that Mrs. G and I get guests on the weekends. Which increases our household workload rather significantly.
I have Fridays and Saturdays off and I’d say Thursday is my favorite. Not too original, I know. But it’s also my second day in the week working in the kitten room. Which means, obviously, kittens. But it also means I’m working on my own and was able to set things up and plan them the way I like them (more or less) on Wednesday, so no co-worker inspired annoyances and fewer nasty surprises. I also have a few regular volunteers I like who come in on Thursday. And I get my paycheck on Thursdays, too.
Yep. Thursdays are good.
Saturday - but the best handful of hours is late Friday afternoon when you can really feel as though you’re never going to have to wake up early ever again. Wednesday comes close, as it’s my designated Ice Cream Night - chosen for that honor because it’s Wednesday, and Wednesday never gets anything cool (interesting fact: the greatest number of suicides are on Wednesday. So I guess it has that going for it).
Sunday morning and early afternoon is fun, but the evening is infected by the close proximity of Monday. Thursday can be nasty when you forget it’s Thursday and think it’s Friday, only to be jolted back to reality when you find out.
Thursday. If you work a regular 8 - 5 job, it means you only have one day left to go, and it’s usually not as strenuous or stressful, have as many people present or hard-hitting. So, it’s like the start of one super long weekend. As for my least favorite? Sunday. It seems so sad, the end of the (metaphorical) party.
Sunday.
Since I work at home, alone, all days are the same for me . . . except that on Sunday evenings I have chorus rehearsal. The only other thing that breaks the monotony is when my partner is out of town on business. But that could be any day.
Varies by time of year. Outside of football season, it’s Friday, but in season it is usually Sunday–unless the Saints are playing on Monday or Thursday night, in which case my favorite day becomes Saturday with a full slate of SEC action.
Right now, my only day off is Saturday.
I picked Wednesday. My active, gotta go out of the house work is almost exclusively on Fridays, Saturdays, and/or Sundays. Rest of the week is editing from home (I’m a wedding photographer.) Wednesday is the nice, happy medium where I don’t have to really start getting prepared for the weekend, but I’ve done enough work earlier in the week to focus on other things. if I want to. Tuesday would be a close second, and Monday isn’t bad, either, most of the time.
I picked Sunday because it’s the only day of the week that I usually don’t have anything scheduled until later in the afternoon. Because I’m a heathen, I don’t have to get ready for church. 
I can stay in my jammies and drink coffee and surf the 'net and play with the cat without any pressure to shower and get out the door. I love my Sunday mornings!
Saturday, with Friday a close second.
I volunteer on Saturdays at the city aquarium and I have a M - F job so right now my favorite day of the week is probably Sunday (I DO, generally, enjoy my time at the aquarium but it keeps me away from my house, wife, and dogs for about 7 hours). During college football season (during which I take time off from the aquarium so that I can watch as much college football as possible) my favorite day of the week is Saturday, hands down.
Can’t decide. Mondays are good because it’s payday. Tuesdays are good because nothing really happens on Tuesday, meeting wise, but Chicago Fire is on TV at night. Wednesdays I get the Food sections from the newspapers and Chicago PD is on TV. Thursdays are good because we usually don’t go anywhere (but go figure - we will have to tomorrow), Fridays are good because - well - FRIDAY - Saturdays are good because I get really good TV all day and the same goes for Sunday.
So I guess I don’t have a favorite.
This week, Thursday (today) is my favourite day. I’ve just finished a twelve hour shift on the tail end of my working week and tomorrow is beckoning me with open arms.
Wednesday. Weird, I know.
For the past 4 years I’ve quit work around 2 pm on Wednesdays and headed to my favorite bar. Originally it was because of a glass giveaway promotion on Wednesdays. Over time other guys i know began copying my idea and using me as an excuse to their SO. Now there is a hardcore group of 30 - 70 year olds who get together weekly.
After my recent heart attack and stent placement my Wednesday beer night was my first solo trip out of the house. My gf put up only token resistance.
Whatever day was yesterday.