As a resident diplo daddy, I love these guys.

They're easy enough to tame and have great health, stamina and weight.

In most cases, when you ride solo, the few things that attack it can be easily overtaken and escaped from (notable exceptions being the rhyniognatha and wyverns). This, combined with their stat spread, makes them great for safely hauling resources over long distances. They can also be used as a host for acquiring a rhyniognatha, should you wish to.