For michief123 it was the idea of having sprites that spawn into the units (though took me longer than I care to admit to work out how to control the race) as it was rather different.
For Lordkoon the spawning wisp things that heal the buildings was also a nice addition to a very good race! However, I was deforested rather quickly as a result of be distracted by those wisps!
For Mephestrial I really liked the idea of having the Hero that uses his base to enhance/enable some of his abilities. Such as the increase in the number of units available to be recalled. However I am aware this lacked balance as I was able to wipe out my enemy rather easily.
All three entries did look the part!