This meta question was closed as opinion based: Who do you like most on SFF.SE?
But, these meta questions are well received here:
Because you were asking for opinions; you were asking the users for their opinions of other users.
The questions you compare yours two are not asking for opinions, but for explanations: were does a username or an avatar come from. While they are list questions, they're not opinion based.
Also, asking users to rate each other is not constructive.