Thinking of partaking in the meme where you share the first five Steam games you ever bought?
Here's my advice: DON'T!
It is a social engineering experiment on the level of "Your porn name is the name of your first pet and the street you grew up on"
It can be used to triangulate your account, and worse, steal it.
https://help.steampowered.com/en/faqs/view/40A0-8B4B-B54B-C51A