I really enjoyed To Love-Ru when I read it a couple years back. The series was pretty formulaic, but I still managed to find it humorous + enjoyable from time to time. Although the ending was very unfulfilling, I was overjoyed to have found the sequel days later. It gave me 'hope' for Rito finally being able to develop his relationships with the girls interested in him, but I was dead wrong..
They had 150+ chapters in the first series to have the characters get into awkward, yet comedic situations. It's been about 50 chapters with this sequel, and just about nothing has changed at all. Actually, I feel like the sequel has managed to regress if anything, given how there's a lot more nudity than comedy, plus the two heroines (Lala + Haruna) from the last series are barely side-characters, and now just make 'guest appearances' instead. I'm pretty sure Rito failed to confess to these specific girls at the end of the first series, so.. Why has he practically forgotten about his love for them?!
Rito's just a nice guy that's clumsy and innocent. There isn't anything else that comes to mind about him, and it's a shame that they can't properly develop his character in the sequel.. Otherwise, the main 'joke' throughout the series is that he gets into perverted situations unwillingly. There aren't many other jokes to find. Like I previously said, it's mostly now just more nudity, along with tentacle groping, imagined perverted fantasies, and girls accidentally cumming without showing it. It's the kind of stuff you'd expect from a hentai, but with this series, private parts + sex (or anything of the sort) will never be shown. It makes me wonder what's the point of pushing the 'Borderline H' as much as possible without ever really planning on crossing it..
Everyone should stop saying how there's a plot to the series. Yes, there's an intended goal they're aiming for (the Harem Plan), but there's little-to-no evidence that actually proves they're getting closer to reaching it. After all, the damn series is episodic and will usually reset everything by the next chapter.
If you're really looking for a good harem manga to start, I strongly suggest trying out Monster Musume no Iru Nichijou. It is definitely episodic and has some clichés, but in this case, the girls are all 'monsters' (half human-half animal hybrids) and are sometimes treated that way by humanity. The protagonist though assumes the responsibility of taking care of them all, and treats them like they're all ordinary human girls, each with a different 'condition' he has to help deal with. In that sense, the series at least gives the protagonist some qualities that make it reasonable to fall in love with him. Beyond that, there are lots of funny situations/shenanigans they all get into, some occasional nudity + fan-service scenes, and some sweet moments between the protagonist and the girls. It's a nice, balanced combination that I can no longer find within To Love-Ru (Darkness)..