I'm putting it again, because I clicked wrong last time lmao
So season 1:
Even though it's old (I love old), it still holds a great standard in my opinion. It's a good mystery, even though I knew something (mostly just that it's messed up and brutal), I didn't expect the arc thing. I love this kind of time-playing very much. I like that even if it's just a first season, it ends quite nicely. Sure, there are more mysteries to uncover, but a lot was explained in-between the lines.
Season 2:
Oh, I enjoyed villain discovery. It's nice because you can think of it before as well. I liked the ending, I think the story ties itself pretty nice.
Specials:
They were just fun and lovely. Nothing more, but really enjoyable.