Arcade game downloads on the Xbox 360 like 'em or leave 'em?

It is nice in this day and age that you can download old arcade games. I have purchased a few for my 360 and it has been with mixed results.

Frogger is a nice change with the updated play but when you try the original game. It seems like the sounds are off from what I remember of the arcade. Ms. PacMan seems really close also but the Ghosts seem more agressive. Time Pilot was always a favorite so no complaints and the best surprise has been how well Tron played.

So can anyone recommend some old arcade games to download or stay away from?

It's too bad Microsoft discontinued Game Room. I had all the Intellivision games and quite a few arcade games. The one arcade game I remember best on here was Jackal.