I also love shifting to flight form as close to the ground as I can get (I die a lot. Always remove your gear!)
I love being able to gather stuff for questions without shifting out of flight form. Just swoop down, gather it, and fly off before the mobs can get to me.
And lastly, I really like playing wsg. Sneaking into the horde base and grabbing the flag, dashing outside and shifting to travel form and speeding back towards my base. :)
What do you love doing as a druid?