I've just come back to Subeta after leaving for... two years, I think? I've forgotten basically everything.

What is the best quest to do, on weekdays, and on weekends?

Everyone develops their own faves based on goals. Some also do them all as now there's achievements for completing them.

As for me my fave set is Maleria for the random items she gives, the Wiz for tokens, and Quentin for amulets to get some tomes. And then WQ because those are boosted rewards.

Doing Wizard quests, specially for the weekend is nice. He very rarely asks for items over 30k and when you do all 10/15(15 if you have a gold account) you get an extra token. Plus he pays out a decent amount of sP as well.

all the quests have been revamped since you've been gone, and with just a little cautioun you can make a profit out of most of them. For some of them the overall profit is small and in others the profit is in the items, so which you do depends on what you want.

I like wizard quests most and then I usually do library quest and drunken carl quest

Wizard and Saggitarius are usually pretty good. Personally I do all of them, and I tend to have better luck with Nori than Mori if you're on at the right times to have a choice. Cinthia is a little harder to get a profit out of, and I tend to do badly sP-wise with the Library but sometimes I get a WL item that makes up for it imo. Those would probably be the only ones I'd skip if not for the achievements.

As everyone has said, it really depends on personal preference and which quests you seem to be more lucky on.

I personally always do Shinwa Quests first for a chance of winning her stat booster items, which can be sold if you aren't interested in battling. You also go through 5 quests of other questers like the Library or Wizard so you earn sP through there as well. Sometimes you get items that can't be sold for much from her, but there are a lot of good items you can get. You can do her once daily.

I also like Wizard and I have alright luck with Cursed Quests and Maleria if I have time. Quentin can be stingy but he gives mage amulets, which are stat boosters and can be sold for sP. Carl is good if you have Omen Islands map.

Really, if you have time, go through a few of each and see how you find them. I personally find Cinthia to not be as profitable and Saggi can be risky sometimes for me.

Wizard is good because he tends to be fairly inexpensive. Besides the extra token you get on the last quest, you could also get the random extra quest buff which would get you another 50 point token as long as you've already completed the last quest. Even better when he's the weekend quest. The others are variable.

Sagittarius is usually good for me but isn't for everyone. I've seen some people say to only spend 20k per item but I've found I miss out on some good earnings doing that. I never do quests that ask for elixirs. That's personal experience though, it doesn't necessarily work that way for everyone.

Quentin is good for amulets but his payout has been pretty low for me lately.

Cinthia and Library quests are probably the least likely to profit for me. Library quests tend to give me higher rarity items though (the ones I don't skip anyway). Often jewelery and stuff on my wishlist. Library quests are also likely to give me junk items. Even when it's the weekend quest.

Maleria, Pete, Carl, and Cursed quests all tend to give me decent payouts. Just have to keep an eye on how much you spend. I never spend more than 60k for Maleria, Pete, and Cursed quests. Never more than 40k for Carl.

Shinwa is always good to do.

I do all the quests though. Even Cinthia's because I need the quest points.

I do quests everyday start with Shinwa then do Quentin,Library, Wizard, Maleria,Cursed, Pete, and lastly Saggitarius

well they already explained a lot about those quests but the ones that I like in order would be:

1. Saggitarius - sudden jumps in SP
2. Wizard - cheap requirements high rewards
3. Library - gives low sp but the items given are rare
4. Quentin - randomly gives amulets but the other game prizes given are not that expensive
5. Maleria and Cursed - guess their fine in their own way
6. Shinwa - gives only one or two but sometimes their expensive too and theres the 5 quests that you should do saves time sometimes

I tend to do most of them everyday.

I do Shinwas quest first. I don't battle, but I just sell the items (stat boosters mostly) that she gives (1-2). Then I make sure to Quentins, spend around 60k the most for the hope of amulets. Wizard, love the tokens. Library, but I don't spend more than 20-25k per quest; items can be nicer. Saggi, although I only spend around 20-30k per item (or 80-120k altogether for 4 items) because I have been burned many times, unless it is his weekend then I will buy whatever. Pete, spend around 60-80k most per quest. Maleria, cursed, and carl if I am in the mood.

I don't really like Cithia's because I never really get sp or items that make it worth it or get any amount of money from it.

I will do the Major Drill quest (easier ones) if I am really bored. You can get some really nice items from him sometimes, retired items plus current/retired SubQ.