Something to try: Teleport on Junglers
So I've been playing around with taking teleport in the jungle, and have found a surprising amount of success with it. With teleport, you are guaranteed to always be set up to counter-gank wherever the enemy jungler shows up, meaning you can gank lanes to your hearts content knowing he won't be able to make cheeky plays on the other side of the map... without you popping up next to him almost immediately. It also works well into the mid/late-game because it means you can create pressure in one area of the map (split-pushing, etc.), but can immediately rejoin your team if there is a skirmish or team-fight.
Also, for those of us that still need to practice positioning and not getting caught, it's good not to have the crutch of flash so that we really have to think about our positioning, vision, and where the enemies might be.
Anyways, something to try for anyone who is interested.