>>3647604It is entertaining, but the Romantica couple gets quite annoying as you go on, especially on the third season because Misaki's hesitation makes no sense after being with Usami for so long and you'll spend most of your time with them. In comparison, the main couple of Sekaiichi Hatsukoi is nowhere near as annoying because despite the misunderstanding being cleared at the first episode, Ritsu believed in that for years, so his insecurity and hesitation make sense. The Egoist couple can be annoying too, the misunderstandings make some sense, but it can feel like they drag on too much. The Terrorist couple Miyagi and Shinobu is my favorite from Junjou and the one I genuinely consider good. For Sekaiichi my favorite is the third couple Yukina and Kisa (I guess I have a thing for age gap), I like the main couple too and I'm lukewarm about the second one, it's not bad, but it's nothing special to me either.
If you didn't watch Sekaiichi, I recommend it after you finish Junjou, I personally found it more entertaining. As for Junjou, if by the end of the second season your dislike of the main couple is really high, don't bother with the third season even if you like the other couples since they only got one filler episode each, watch them separately if you want.