More quarters please...
I never really got into the arcade gaming thing, but I remember that I used to enjoy playing Galaxian, as it one of the games I didn't totally suck at. Last year I had it on my mobile phone. My favourite game now is World of Warcraft. Yes, it's addictive and ubiquitous and annoying at times, but it is still so much more enjoyable than anything which came before it. Maybe there are better MMORPGs out there, but as a Mac user I'm limited.
