I've been looking at sets and thought "what are my favourites and my least favourites?"
Here it is
Popipa
Favourite set: Ensemble of Cheers

I love this set! It's just so pretty and cute. It radiates Popipa and friendship energy, and I love that!
Least favourite set: Lucky Five Colors

There isn't anything particularly wrong with this set, it's just "meh".
Afterglow
Favourite set: Nostalgic Snow Globe

Do I really have to explain? This is just so pretty and seing child Afterglow is just amazing as well.
Least favourite set: Dreaming Sweet Princess

I just feel like this set kinda "missed" the Afterglow vibe... The worst one is definitely Tomoe. She normally has really energetic cards, but this one just seems so flat...
Pasupare
Favourite set: Hazy Samurai Heart

Bushido! This set is just really nice: the colours, the outfits, the background, everything is just amazing!
Least favourite set: Joining Lights: Road to Prism

It really hurts to say that, since it's band story, but this set is just so boring... It almost feels like the trained cards are untrained cards from backstage pass...
Roselia
Favourite set: Crash x Time

All the cards from this set are ABSOLUTELY INCREDIBLE. Even the 3* and the Rinko 2*.
Least favourite set: Fantasy World Beginning

I have absolutely nothing against Re:Zero. Here again, nothing particularly wrong with it, it's just "meh".
Hello Happy World
Favourite set: Rainbow Tone Night Decorations

I don't even know why, but this set is just so pretty to me. The colours are really nice, the outfits are pretty and the background too. The Hagumi 3* for that is.. wow.
Least favourite set: Se-c-ret! Lucky Charm

Here again, I do not hate on the collab or anything like that. I think it's a really good match for Hello Happy, but I feel like the art doesn't match. It's like they tried to do two different art styles in one card and it feels kinda off. For example, Kokoro's face is made with the traditional bandori art style while they changed the outside to match the franchise more.
I did not include RAS or Morfonica since they didn't have a lot of sets. Tell me what you think in the comments, I'm curious about if some of my favourites are your less favourite or if some of my least favourites are your favourites.