Jackal (fastest mount on uneven terrain, can completely avoid fall damage, quick endurance regen)
Springer (extremely useful to climb on stuff)
Skimmer (useful to avoid water and more, no fall damage)
Beetle (useful to explore a map on land extremely quickly)
Griffon (has decent jumps and can cross gaps, good to explore some maps quickly)
Raptor (clunkier to control than Jackal, bad at uneven terrain, gets fall damage)
Skyscale (clunky, awkward to use)
Warclaw (gets outclassed by everything else in PvE)