This is kind of a "suggest games I might like" topic, but it comes from a realization I had as played my favourite games in mame on my PC.
All arcade games seem to one a few types:
-3rd person driving
-Side scrolling fighting
-Overhead fighter plane/space ship
-Side scrolling fighter plane/space ship
The games that I remember loving in the arcade were games like:
Knights of the round
D&D Tower of Doom / Showdows Over Mystara
Ikari Warriors
Chase HQ
TMNT / Simpsons
Off Road
Black Tiger
I was wondering if anyone had any comments on gameplay type and any suggestions of real innovation in gameplay from the 80's arcade era. May I also add that I really appreciated games which used hardware to innovate gameplay like Terminator, Area 51, the Sniper ones I think were called Silent Scope. Also freewheeling driving games like off road, demolition derby, and the racing one where you drive around and there are little wrenches and oil slicks on the track. I might as well throw in the first arcade driving simulator I remember, Hard Drivin'. But all of these relied heavily on hardware that's not reasonable to build into your first and low budget mame cabinet.