I kind of wish it behaved like the Sandstone Drake/Heart of the Nightwing, so druids can get the +1 to the mount collection other classes are getting and have it act like a shapeshift with the ability to carry passengers. But I don't have a horse in the race.
In defense of people who play druids and collect mounts, not only did I have a massive collection, I preferred riding them to flight form- especially after going from tauren to troll in Cata. My mileage probably varied since my main had dual crafting professions (so I didn't need to herb in form), and instant flight wasn't important to me (played on a PvE server). I also hate that the phoenix rig used for the druid class mount/form can't land.
I really, really like riding mounts in moonkin form too. Especially absurdly small ones.