I built a barcade with a pi and it's been working well. It took a little finagling to get working right, but now that I got it, it's working great.
I used the "zero delay" USB board to go between my joystick/buttons and the pi's USB port. I actually use two of them, one for player #1, one for player #2. It was easier than the other, dual player, adapter board that I can't recall the name of at the moment.
Here's an example:
Get the one that has the right size connectors on the wires for your button connection tabs. I think there's two different kinds out there.
Keep in mind that more games is not necessarily better. I've got so many games, it's like going to a restaurant with a huge menu, you can't decide what to play. Don't over do it.
Looks like the pi 3B+ is the latest and greatest. I run retropie, and it's fine for me.