I played a little "Boom Boom Rocket" a second ago. Got to 7:37 minutes in endurance mode while playing "Game Over Beethoven".
Trying to enjoy "Heroes of Mana" on DS but it is such a failed RTS I don't know if I can stand anymore.
I also played a little Guitar Hero and noticed as you said about reflexes before. That I play the most songs with reflexes and not by memorising. Songs such as Cliffs of Dover and Through Fire and Flames I can complete with just reflexes. It's amazing how I can keep up with those nodes everywhere.