I'd like to see an Andorian captain; someone with a more military bent.
And XO that balances this with the 'humanitarian' aspect of the ship.
Some other background race than the one's that have gotten a bunch of attention -- like the Betazoids, KLingons, etc... Maybe the cat guys.
"War is an ugly thing but not the ugliest of things; the decayed and degraded state of moral and patriotic feelings which thinks that nothing is worth war is much worse. A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself."
John Stuart Mill