Easily WV!! Don't get me wrong I love all of them so very dearly, but WV's story has grown So important to me over the years. I think about him basically every day. Homestuck's first revolutionary in a line of like four different revolutions. He means the world to me my silly little guy who engages in play therapy and wants to build a better future and manages to hold onto his hope and whimsy even in the face of So Many Horrors.

Aside from WV, PM is obviously up there (if you're a fan of one, I've found, you're a fan of both), and other than them it's Sollux/Davepeta/Nepeta/Roxy/Karkat/Rose in alternating order depending on the day :3