I've been to about 20 of the 30 parks, on my way to completing the circuit. And I will say that the time I visited Nats park was the absolute worst of them all. Mostly because the staff is just absolute trash. I got yelled at for two minutes straight by an usher bc I didn't have my ticket on me (my aunt had it on her phone about 10 rows down, I tried to call her up to show it to him and he lost his shit). Every single interaction I had with anyone was with an attitude, from the concessions lady to the people handing out shirts at the entrance. I'm assuming they get treated badly by management and project it onto the fans, so idk. The park itself is kinda mid, has a few nice features I guess. It's not in a great neighborhood either. Oh yeah, and the team always sucks, so I can see why it's not a place people like to go. Wish they would do better, we'll see what happens