Reason why I like a lot of Vtubers is because they have more fun personas.
Not fun in the frat boy sense ( lots of screaming and acting like a douchebro ), but they're less real and more cartoony and it makes them more entertaining.
There's also some that are legit rly talented, Mori Calliope comes to mind she's actually a really good singer her songs are really good.
And Ninomae Ina'nis is a good artist too, I do art myself so I enjoy watching her stream doing her art in the background sometimes.
Kiara and Mori have funny interactions going between them too and Kiara has a funny over the top personality and Gura is just wacky.
Those are pretty big ones tho I've watched others in the past too but they're the ones I tend to think are the funniest and safest go to.
Some of the Japanese speaking ones tho can be pretty funny too but I don't speak Japanese so I have to rely more on clips for that.
Quite frankly very few people are actually interesting or entertaining enough to consistently be fun to watch for hours on end, so I think Vtubers putting on a more overt persona meant specifically for entertainment instead of trying to give off this facade of '' being real '' is just more enjoyable.
Mikepreachwow is one of the few exceptions I think who is pretty much always fun to watch he's just a pleasant and fun person and I don't think it's fake at all.
He definitely has some '' old man '' uptight and puritan views and attitudes sometimes which can be a bit annoying but overall I think he's just naturally entertaining.
And when he goes out of his way to increase it then it's taken to the next level ( like with the PvP tournament or some of his FC interactions he has gotten more involved with ).
Consistency I think is a big issue a lot of Streamers have, it's one of the reasons why I really like Turin as a caster and RTS streamer too because his commentary is very consistent it never feels like there's these long moments of silence leading up to a huge overreaction or just repeating the same catchphrase over and over again.
He's just very pleasant to listen to and makes me pay attention to what's happening.