Jumping linked to an Acrobatics skill is a must (IMHO) and should scale with ranks in that skill - a Monk should be able to jump from one side of town to the other or up the side of a castle's walls (ok maybe not that far, but if you've played a Monk - or someone with lots of ranks in Acrobatics - you'll get the idea). Jumping without ranks in that skill could be limited, but I don't know how that would work in practice - perhaps a chance to incur falling damaged scaled with the height and distance jumped, reduced in some way by the number of ranks in Acrobatics if they have any to represent the risk of twisting an ankle or falling flat on their face.
