I know a few of us have multiple consoles, so what system do you have the best completion rate for? Which is your worst?

My best completion % is like the SNES and PS1 since I have completed about 80% of all the games I own for it. My worst is technically my Switch since I only have two games for it and haven't finished either, but ignoring how long I've had it, my Steam account will likely be my worst since I've beaten maybe two games I own for it, and I have a larger library than I remember for it.