I found myself caring the most about Bellamy and Octivia's sibling bond actually when it come to the relationships on the show, I'm always here for those ~us against the world~ kind of sibling dynamics and the flashbacks with the two of them were very sweet.
YES. I am so here the Blake siblings.

I was never a fan of Finn, like ever. lol. The way the show handled that whole situation with Clarke, him, and Raven just made it worse - because he came across like a total douche to me, despite how they otherwise tried to sell it.