I want to ride a beetle. I know it doesn't fit or anything, but a giant Japanese rhinoceros beetle would be the best possible mount. Ramming horn, super strength built-in stirrup and armor, and it can fly levelly.
They also have a glossy finish, not unlike a motorcycle.
I'd like to ride a bear. A flaming bear. With wings. And a space helmet. And the space helmet shoots lasers. And the lasers turn things into double rainbows. It's not much to ask, so I have my fingers crossed