Well, going by my list in the Top 100 Games thread (that’s right, we have a Top 100 Games thread, have you put your entry in?) my number one is Starflight, which would certainly be a respectable choice in my opinion.
Then again, my number 11 Plants vs Zombies is the game I have probably spent the most hours with, and played on the most platforms. It’s kind of my go-to time killer, I never get tired of redoing a level here and there. So that too would have to be weighed as my favorite.
But then there’s Pac Man, which is probably the game I’ve been playing the longest, in terms of when I started playing. That’s another classic, and I don’t see myself ever getting tired of it. The Championship games are totally fun revisits of the formula. So, you know, there’s that.