Its hard to describe, but I guess the best way to describe it would be, its like after all three kids have grown up and moved away and I wake up naked and spend the days relaxing around the house and not have to worry about ever putting on clothes again.
Yeah, fretless bass is freeing, I've never tried a short scale fretless though, in fact the only one I can think of offhand is the Epi fretless EB-1 and I haven't seen one of those for a long time.
Whenever I play fretless, it feels like riding a bike with the training wheels off. Which means falling down A LOT at first.