[MadDogBV]

When making simfiles - paddable ones, especially - I tend to rate on the ITG scale. Thus, I will give songs ratings of 14 and 15 if they are harder than the hardest songs in ITG, and even the occasional 16 if they're near-impossible to play on pad but still indexable. I think that's fair enough. Whether for keyboard or pad, any rating above a 16 is overkill for me, unless it was truly impossible or the author just wanted to make a point (573).

That's not taking into account DDRX's difficulty system, which I personally won't bother with yet until it gets more usage over the next few DDR iterations.