I use DWI mostly. I like it better than Stepmania for some reason.
Fav songs...Waka Laka, Sweet Sweet(Love) Magic, Butterfly(Upswing Mix), Burning Heat(3 Option Mix), Flash In the Night, Stay, Big Blue X(fanmade)...
Lots more too.
The hardest I guess would be Big Blue X, since its 240 - 120 BPM, 9 steps and is just INSANE. Trust me...
Nothing I'm really trying to pass...just trying to get most AA's I can. Not good with a pad, but AWESOME with my fingers.
All the songs I listed I have at least an AA...'cept for BBX, I have an A on it. Fun shit.