Microsoft Solitaire

The Good
It's easy to play and master. It's a good way to kill time. The graphic interface makes solitaire much easier to play than the real world counterpart. The decks come with funny little animations if you're patient enough.

And unlike other computer games, you can pretty much play it on even the most ancient hardware.

The Bad
It tends to default to 3 card shuffle.

The Bottom Line
You've played it as much as I have.