Jamba has a follow after combat option. My hunters break follow on steady shot and my locks break on drain life, but I almost never notice it, since they don't move alot and they auto-follow after combat.
Hope that helps.

PS. You will never be able to stop the breaking of follow for castings/channelings, it is Blizzard that does that, not an option that you can turn on or off. You can minimize how much it bothers you with a follow key and an addon that auto-follows.