In my opinion the best of the races commanders where:
Chaos - Eliphas, Bale sounded like a man with a sore throat and Crull was too crazy to command a fly.
Eldar - Original Farseer macha! She had the deeper voice and frustrated gabrial angelos to the point of saying "stop speaking in riddles!"
Orks - Gorgutz is great, orkamungus blew hard, wasn't tough and sounded shite.
Imperial guard - I'm undecided, new one is american and too young, the american bit sucks, i liked the english of the old guy, however he's too old!
Necrons - Well, the first time they've done one really, I like him
Tau empire - Ok one gripe, WHY AN XV22 BATTLESUIT!!! These are rare battlesuits and there are only 2 of them and 1 belongs to shadowsun, I would prefer and XV8 battlesuit commander, that would be far cooler.
Space marines - New guy is great like the new voice and image, old guy was good but his face was bit badly done, he look like a man who went pre-maturely grey.