Pattern games: Impossible to keep out of tourneys. Too damn many.(posted 9597 days ago)Galaga, Gyruss, Pang 3, Mr. Do's Wild Ride (to an extent), Combat School (to an extent), and at least one other game - I'm not telling yet :P qualify. I'm willing to write more to back up the first 5 if someone really is terribly blind today.
Hard as Hell settings - ABSOLUTELY! I can't believe someone actually said it before I did. Unless it's impractical to change the settings (Bally MCR games) or the game is pointless at hardest (any examples?) there's no reason not to crank it to 11!
Some games are more compatible across platforms if you turn the sound off. I don't know if you tried that.
Aqua