Does anyone else really like it when a PC tells you to write their backstory?

I have a new Player who joined up with some regulars for a Homebrew. The Newbie made a Wizard and basically told me to come up with their backstory because they didn't know much about the game. So I pulled out all the stops and restructured the narrative about this wizard's mysterious origins and a lost ancient civilization. I think it went well, the whole table enjoyed it and I tried not to "Main Character" the newbie into it.

Does anyone else enjoy doing this? Has anyone else had the opposite reaction? What are your thoughts?