How many is to many?

So I’m relatively new to this new hobby/lifestyle. And I cannot be more thrilled, however, I am wondering when does it turn from oh cool he has a couple of arcade games to an obsession? Right now I have Mortal Kombat 2 arcade one up and NBA jam four player arcade one up. I have a fully modded legends ultimate machine. And I’m about to go pick up a legends ultimate mini machine fully modded. Oh and my brother has my Ms Pac-Man vault edition at his house.