Difficult to pick a single fave. Here are the games I’ve spent most of my time playing back then.

On PC:

• X-Wing series (X-Wing, TIE Fighter, etc.)
• Star Control 2
• Earthsiege 1 and 2
• Starsiege: Tribes
• Team Fortress mod for Quake
• EverQuest

On arcade, mostly fighting games, and some side-scrollers:

• Mortal Kombat 1, 2, 3, 4
• Killer Instinct 1 and 2
• Virtua Fighter 1 and 2
• Marvel Vs. Street Fighter
• TMNT
• X-Men: Children of the Atom

Want to go back to the 80s? Lode Runner, Rescue on Fractalus! and Karateka. Also Gyruss introduced me to modern remixes of classical music.