i think hao is pretty open about what he's feeling. he would "hide" it sometimes but i think he's pretty easy to read for ppl who care/know him well? Like when he went on bubble live and was like i argued w hanbin bc FRIENDS argue :) like he was sort of trying to be nonchalant but it seemed pretty obvious that he was upset/annoyed lol. hanbin on the other hand seems like he's very outward about his feelings but I think that's just him being extremely empathetic. a lot of moments where we saw him be emotional esp on boys planet was him being emotional for other ppl. it feels like he also doesn't like to share negative feelings, esp when its regarding himself so he just keeps it bottled up. obviously idk them personally so i could be completely wrong but at least that's how i see it lol