Thanks for responding, Zephlonix and Charagma.
I still enjoy firing up quite a few old arcade games, mostly shooters. They're also mostly pre-continue feature (ie Insert more coins to continue). I enjoy the likes of Asteroids, Black Widow, Centipede, Galaga, Gorf, Phoenix, Robotron 2084, Galaxian (although I actually prefer the NES version I got in a PC compilation over the arcade version now), Pooyan, etc. etc.
One reason I still play games such as those is the fact I can just play them any time without having to consult any manuals or bother with cutscenes (don't like cutscenes, just want to play the games!). Aiming for high scores on a single credit is sufficient.
I hope I never have to give up gaming completely. I suspect a lot of non-gamers think of all videogames as violent and fast moving (and those arcade games certainly fit that description!), but there are some excellent puzzle/board games out there that do not require you to react quickly and give your brain a good workout. As I said, it isn't that easy to find the gems among all the dross. I have found a few, though.