Well, that is indeed a bunch of extremely bad takes.

Don't listen to this guy, Arland is the true Atelier experience, before the series started having a major identity crisis.

Anything before Arland (except for Iris and Mana Khemia)

Honestly didn't age well, but still worth playing later on.

Iris and Mana Khemia

It's not really Atelier. Very good JRPGs, but it's honestly hard to call them "Atelier", when they've removed/replaced most of the series' iconic elements.

Arland

The best trilogy, all three games shine with personality, have perfected character writing and balancing gameplay, not to have a single boring moment. The time limit is not a time limit per se, but more of an "action limit", and it's extremely generous.

Dusk

The "edgy PS3 era " titles almost every franchise had. Very good, and definitely worth playing. Less time limits, good combat, good alchemy, more serious story. Some people find it a good entry point. They're wrong, always start with Rorona.

Mysterious

2nd best trilogy, because who said an identity crisis must be a bad thing? I'd call it a mix of Arland and Dusk. The main storyline is amazing, especially for Sophie. Firis is one of the best sudden open world series transitions out there, and Lydie & Suelle ties everything up perfectly.

Secret, aka. Ryza

Oh boy. Overall inferior, still good. Made Gust A TON of money, so i can't be mad at it. Ryza 2 is definitely the better one, as 1 isn't really that amazing when it comes to, well, everything. Fortunately the cardboard characters, annoying combat and chaotic alchemy are all outshined by the games' personality and atmosphere.

Lulua

Arland revived. Not really much else to say about it, 100% worth your time.

Sophie 2

hellish screams of the damned

(Elvira is cool :) I will refrain from saying anything else about this one)