It's just a really solid shooter, which I can hop onto solo or with a friend whenever I want to. Battlefield games may have more immersion and "epic gamer moments," but this game takes up only 2 GB of my disc in comparison to 50+ GB of BF4 or BF5, so it's an obvious choice for me when I want to casually blast some people.
Just remember that not a lot of people use voice chat anymore and the updates are very lacklustre for an early access title, so the playerbase may go dead sooner than I would like to :(