These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Ensemble Darkhorse: Sugawara. He ranked fourth in the first popularity poll despite not playing in any matches since Kageyama became the regular setter (he only played in one match for a partial amount of time during their actual match with Aobajousai). Then in the next poll, he ranked first.
Ho Yay: It's kind of inevitable due to having a primarily male cast, but it's less then what one would expect.
Hinata and Kageyama's Vitriolic Best Buds friendship attracts a certain type of shipper like flies to water, and it doesn't help how they quickly grow into an extremely-close partnership that others confuse as lasting much longer than it has.
By the way they're introduced, Nishinoya and Asahi acted as if they were a couple who are trying to make up after having a big fight.
There is some between Kuroo and Kenma who are childhood friends despite being a year apart. Kuroo trusts Kenma a lot with his skills so he never doubts him.
Itís almost inevitable to see some of this between Sugawara and Daichi, thanks to their status as Team Mom and Team Dad of the team and Sugawara being Daichiís Number Two and also the only one who's allowed lecture him.
Launcher of a Thousand Ships: Hinata, good God Hinata; there's Hinata x Kageyama, Hinata x Tanaka, Hinata x Tsukishima, Hinata x Nishinoya, Hinata x Sugawara, Hinata x Yamaguchi, Hinata x Kenma, Hinata x Kuroo, Hinata x Lev, Hinata x Kiyoko, and the list goes on; quite literally, Hinata could get shipped with anyone.