You really think they're biased? I put champions I hate and dislike (or find boring) at the top of the list if I feel they need to be up there. Some of my favored champions are in lower tiers. Hell I really enjoy Zed but he's not the best jungler out there. He's fast and that's about it.
It seems that YOU are the one biased for those champions so much so that you blind yourself to their significant weaknesses.