I've played most (maybe all?) of the PS2 versions, and of them I like Supernova 2 the best. The steps simply have the most fun choreography, if you can call DDR choreography. It also has the best difficulty curve, since difficulty ratings can be really inconsistent in other DDR games.
Stay the hell away from Supernova 1, though. It's a total abortion of a game.
I briefly played Hottest Party 1, but it's hard for me to compare it since the soft pad I was using at the time impaired my enjoyment.
"The worst part about these reviews is they are [subjective]--and their scores often depend on how drunk you got the media at a Street Fighter event." — Mona Hamilton, Capcom Senior VP of Marketing
*Image indefinitely borrowed from BrainBoxLtd without his consent.
