Quote Originally Posted by Ualaa View Post

I personally spam the key, and enjoy the circling about of the target in pvp.

This. You want that confusing annoying movement going on in pvp, messes with them targetting you and getting casts off.

In pve I generally use a quick tap of my down key (movement slave only) whenever I want them to chillax and stop moving. This will stop the movement while keeping them in range of whatever they are currently attacking. I also have a /follow macro on a quick to hit key that I use if they are running off after combat.