[ddr_f4n]

ITG is great for it's difficulty and charts that are fun. Downfall IMO is the music, which isn't the best.

DDR has great J-pop songs and a huge songlist. Downfall is the stepcharts itself, which sometimes don't make sense at all.

PUI...haven't played much, but seems to be great so far, but I'll put it lower than ITG until I get better at it (when there is a PUI machine nearby). Music seems great, and stepcharts are hella fun so far. Downfall is that it's not easy-friendly at all.

THEREFORE:

ITG>PIU>DDR.