I've seen plenty of macros that allow you to randomly pick between flying mounts and ground mounts, but I've never actually seen one that only picks from your 280% flying mounts or your 100% ground mounts. I've got somewhere around 90 mounts at the moment, so it would be fun to randomly get one of my many mounts instead of having a single mount to use all of the time. I know they make addons that change mounts are semi random, but none that actually randomly pick from the right kind of mount. Of course a macro would be better than an addon, any one know super special word that does this for you in a macro?
EDIT
and just to clarify, the main question i was asking is is there a modifier to differentiate between choosing from 280% flying mounts with 150% flying mounts, and differentiating between 100% ground mounts and 60%?