It's an important source of connection for my girlfriend and me.
We are both massive nerds who love gaming, and playing together is a way for us to share that passion, spend quality time together, and relax and enjoy each other's company.
We're very different kinds of gamers; while we do share some preferences, she is primarily a PC gamer and also plays a lot of more casual software like Animal Crossing and Pokemon Go, while I'm a console player first and foremost who favours more "traditional" games, but this difference has allowed us to introduce each other to new experiences and be each other's guide in exploring them together.
There are few things better than sharing your passions with the person you love.
(Just swap these two around; she's on the PC, me the Switch haha)