However, I also like the idea of getting into melee but then pushing the enemies away from you, thus also keeping the enemy from being near you (staying Controller). This has the added benefit of being able to push enemies into the vicinity of a Defender.
The difference between this (a Controller) and the Warlord movement abilities (Leader) is that the Warlord is giving this to other people, while the Martial Controller is doing this primarily as himself (and maybe using his enemies as thrown weapons, heh).