Strategy rpg's!! I never thought they were so good. Front mission,Bahamut Lagoon, Energy Breaker etc. they all are so good.
The Snk NeoGeo MVS. The home to the best arcade titles i have ever seen & in the history. Try this out,lots of games to try from different genres.
Fighting - King of Fighters series,Art of Fighting series, Fatal Fury series,Garou Mark of the Wolves etc.
Run n Gun - Metal Slug series
Shmup's - Aero Fighters 2 & 3,Blazing Star,Andro Dunos, etc.
Also there are some good platform games too.
Want to know more check this link.