I miss the variety of peripherals that home entertainment will never match. Flight simulators that rolled you upside down in a gimble, lightguns, punching bags, racing seats with clutch pedals and surround vision, all those fun immersive gimmicks that are too costly to set up at home.
Indeed, SEGA was the king of those. I absolutely loved flying upsidedown in R360 - G-Loc Air Battle, so cool ^_^
There were only a few arcade machines in the town where I grew up, so it was a huge deal when I went to other towns that had them and spent quite a lot of $$$ on them. Remember spending lots on Final Fight, Midnight Resistance, Pang!, Cabal and others with friends. And they were usually quite hard too so a lot of coins where used.
I rather miss those co-op games where you play together with a friend on the same screen, most co-op multiplayer games today require you to play together on separate machines, so you can't sit on the same couch and use the same display. Very unfortunate.
The fighting games were a lot of fun too, like Street Fighter II, Virtua Fighter and Virtua Fighter 3. Because I usually only needed one coin to play thru the whole thing
With Virtua Fighter 3, which was the last arcade in this town 10+ years ago, I had my name on the whole high score list!
Oh, and Blazing Star was very fun too ^_^