[Intuition]

I have my mame64ui configured for Metal Slug.

I was able to get MS 1, 2, 4, and X to run. The copy I have of 3 isn't recognized by Mame for some reason.

Now that I am older and could buy a full Neo Geo system I have been tempted but have yet to do it.

I mean specifically the cartridge based AES system. BUT since my main interest is the Metal Slug games I have yet to do it since the Metal Slug cartridges for AES are very expensive even by Vintage Game prices.

The arcade carts are of course much more affordable and available so I'd look into the converter that can use the MVS board as mentioned here.

My list reflects the lists here.

Samurai Showdown
Metal Slug
King of Fighters
Fatal Fury
WindJammers
etc etc

At the moment my Mame tides me over. Though at some point I'll make the jump.