The typical MMO issue with height is that they normalize walk and run speed so your small races seem to be moving super fast while your large races seem to be lumbering along.

Oddly enough I don't get that sense on any of my Viera (max height). It's either a happy accident or they've got a genius of an animator.

The Midlander run anim kills me every time but I'd love to have their pose on other races. Heck I wish we could configure each of the various animations. I know, I know, everybody will use Miqo'te /panic