My main goal is to 100% complete Steam itself.

Have every achievement in every game
Maximum friends + highest level on everyone's friend list
Play every game/software for at least 1 hour
Own, review, and follow every product + review every product as a curator
Have max level badges for every game
Screenshot and video for every game
Have maximum showcases at maximum level
Wishlist every product I cannot get
Be in every group
Favorite every screenshot and video