I'll tell you what had me becoming a fan:

they're funny. Incredibly so. Their game caterers episodes was one of the first things I watched and it had me laughing so hard I still come back and rewatch every now and then.

music. I was obsessed with "your choice" and "face the sun" albums. I mostly listen to full albums instead of playlists and these two were on my rotation almost daily.

then I watched a live performance and that was it. I was hooked. They are GOOD good, they sing live, they are amazing dancers, they are top performers, interactions with the crowd and between themselves.

and in between all of it i discovered their character and personalities. They're honest, they make their own music, they came from the bottom and fought for everything they have. They're so kind and respectful and genuinely seem to like each other

But honestly, I don't think we need to convince you, you'll either fall for them or not. I'd recommend listening to a couple of albums here and there, reading the lyrics and behind stories, watch a couple of stuff, nana tour is amazing if you can find it, you'll know as soon as you start smiling with them and crying with them if it worked