The generic artwork that goes back 8 years and seems so cliche to me is "totally freaking amazing" to my buddies.
So... the artwork is blah but you're non arcade savy friends would totally dig it? Gee GG, that's one helluva compliment there. Tell us what you really think. 
I mean the really really old overlay with the lightning in the middle going out. The designs I remember when I was in college and bush was serving his first term.
The stuff that was first created and repeated time and time again. The knievel remakes that you would never do because you want a unique arcade would seem like the most amazing thing since sliced bread to average people.
This guys work is some bad ass custom stuff. I mentioned his saying the castlevania theme works since only the people on this forum would think you need a fighting overlay for a pedestal stand.
Themes matching cabinet style are only important to other builders perusing the threads. If it looks good to you go with it.
I guess I didn't put my words down right the first time.