Sounds cool, eh? K, here's my idea.
I think it'd be fun to be able to craft an item called a "Saddle" which would enable you to ride some animals that aren't at the moment ridable. For instance the Gaman I mentioned.
After you craft it though you have to "Fit" it to the animal so that you could then ride that type. For this you might have to combine at least one of the animals into it (like how you combine one into a taming deed) and lets say some set number of leather, cloth, and ingots. Doing that won't give you a new item, but just the ability to then ride that type. So this "Fitting" process could be fun all in itself excpecially if we have to hunt it down and tame an extra to add into the saddle's list. If you do get this going, please don't make that fitting process uber expensive. I'm kinda low-middle class in the WP's economic world lol.
I didn't mention what types really because I know their'd be some sprite issues (like nothing too small such as cats or dogs) with some creatures but I figure the ones that look like they could be ridden like Gamans and Drakes.
**Anyone reading this please comment and help the idea along. What Animal/Monster do you think would be cool to ride??