A few possibly crazy ideas I had:
You know those hunting/fishing paintings you see in like places like Bass Pro Shops catalogs or Cabelas, I thought it would be kind of neat to make a woody type cab like Knieval's for example and use marquee/ art especially that was from those paintings, it would look like an arcade cab in a hunting lodge or something.
Second, in a more colorful, "arcadey" type cab, I think it would be neat to have a water theme on the cp. Like what if the joystick dust washer was hidden under plexi and you had the joystick coming out of a lily pad graphic. Then maybe a yellow ball top (which resembles a lily pad flower bud) and then for buttons, imagine Happs red and white buttons, but switch the bezel/plungers so they are red bezels and white plungers or vice versa to resemble bobbers in the water on a blue background. Sort of logical since when you pressed them the "bobbers" would go up and down sorta, kinda lol.
Then a crazy thought I had was to showcase some antique or newer lures somehow, like imagine a 3d type monitor bezel with like a black rack or shelf you could make that held actual lures with plexi over it for the bezel. Weren't there a few Sega fishing games in the arcade too? Klov isnt working for me right now, maybe the art on those can give some ideas.