I don't mind Chappell because he's not afraid to speak his mind.
Healy is bad because he just thinks he's awesome and that he can say anything and people will find him entertaining. He was very irritating during the 20/20 match. Trying to gee it up way more than it deserved (as in the strokes that were played).
Greig is the worst because, like Healy, he is so far up his own @rse that he thinks everyone values the crap he comes out with. He loves seeing Australia lose but can never openly admit that he is barracking for the opposition. He also stuffs up a lot when trying to call the action which p!sses me off, and he spends a lot of time talking up players who are absolute donkeys. When you look at him and hear him speak, it's hard to believe he played cricket, let alone captained in tests.