I actually started out as MAME only; in fact, if I searched back on this site, I could probably find at least one post from me advising somebody that console emulators on the cabinet are a waste of time. But, I changed my tune somewhat as I observed how things played out over time.
Of all my extended family and friends, very few of them appreciate retro video games like me. What I found over the years was that most people visiting my house and going “wow, cool!” at my MAME cabinet make no distinction between “arcade games” and “console games.” To them, they’re all just old video games, somehow brought back to life as if by magic, on this big machine I built. They don’t know what emulators are, what ROMs are, etc.
“Do you have that Ice Hockey game where you get to pick the fat, skinny, or medium guys?”
“Do you have Mario Kart?”
“Load up that one fighting game we used to play… what’s it called… Streets of Rage!”
“Do you have Miner 2049er?”
“Do you have Enduro?”
I’d have to explain, “nah, sorry, this thing only plays arcade games.” I could always tell they didn’t really get what I meant by that. After all, I probably just finished explaining to them that there is a PC inside the cabinet… so what’s this about arcade games again?
Finally, I decided to load up an NES emulator due to the preponderance of requests for NES games. The next time somebody asked for Super Mario 3, I was ready. And I realized it wasn’t all that bad; I’d get playing some of the games with friends and end up enjoying it. So, I added a few more emulators for consoles I personally had (Atari 2600, Atari 7800, Genesis). I tried some others, and ended up deleting them because they didn’t work very well with the controls (Atari 5200 comes to mind, I’ve still got INTV on there but probably not for much longer).
I remember playing Robotron X on the original Playstation, but when playing on the actual console you’d have to use the stupid d-pad for movement and the face buttons to shoot. Now I’ve got that game running on my cabinet with twin sticks… pretty damn cool; vastly superior to even the “real” experience of the original hardware.
So, MY advice to noobs reading this thread is this: don’t spend a thousand hours laboriously loading up every emulator and rom you can find, “just because”. That’s a recipe for burning yourself out. But, if you think of something from your past that you want to play with arcade controls (8- and 16-bit era shooters and beat-em-ups are great choices, as are SOME platform games), or if you just want to explore some old games on different platforms out of curiosity, there’s no harm in giving it a whirl on your cabinet. Some of them are great fun, others not so much. Keep the ones you like, ditch the ones you don’t.