Good question.
I guess the great thing about a home collection is that you can have all the variety in your games that you want. I'm really enjoying the SS games in my collection particularly the straight shooters where your not so much working your way through complex modes but you still have to hit your targets or the ball is going to drain for sure. But then some times I enjoy a game like DE Starwars where  your advancing several modes at a time because even when you miss a shot your still doing ok.
Asteroid Annie and Flash Gordon are getting a lot of play from me at home at the moment, right now I love them both.