I don't know where to start so well gonna play it easy and pick Rome at the start just to get a hang of the game but maybe then move onto Persia or one the many tribes in Europe.
I strongly believe that playing as an island minor would be the best non-Diadochi Greek save. Which pretty much means being Rhodes or one of the Cretan minors, though iirc there are some other options as well.
Who are you looking forward to playing as?
Macedon or a Middle-Eastern nation will be what I'm interesting in playing. Myself making a Greco-Persian empire controlling the silk road and the Mediterranean sounds cool.
CarthageI will play as Carthage to protect antiquity from Rome's christianity destroying the true european culture.
????Playing as the Etruscans to stem to spread of Hellenic culture.