Blizzard MVP Palehoof has come up with a pretty awesome idea in the Suggestions Forum: she suggests that hunters be able to tame their own mounts. Unlike paladins and warlocks, hunters would have to pay for their riding skill -- but after that, they'd be able to get unusual mounts. They could use Beast Lore to locate a creature that would be appropriate in size, shape and temperament (and not every member of every species would work!) and then use "Tame Mount" to turn it into a normal, inventory-based mount. She suggests that quests could unlock later levels of Tame Mount, so hunters could get epic mounts, flying mounts, etc. Also, rare reputation mounts like Wintersabers and Nether Rays could simply be untamable.
I'm not a hunter, but I love this idea. Anything that allows players to make their characters individuals is fine by me. Just looking at Petopia, I can think of more than a few trainable hunter pets that would make great mounts. I'd love to see a troll go riding by on an albino crocodile, a tauren wandering past on a giant gorilla, or a night elf mounted atop a garish pink flamingo. In fact, I would like to see it mandatory that female night elf hunters be mounted atop garish pink flamingoes, but that's more of a personal prejudice. And no, Hordelings, you can't use gnomes as mounts. Stop asking.
If I could pick my own mount, I'd probably try to tame the big dude pictured above. His name's Zarakh, and he's a spider boss found in one of the lowbie Draenei zones. Can you get any more menacing than that? What would you use as a mount if you could?