I just realized what bugs me about ground combat and its the complete silence of the persons involved. I mean if you fight a horde of Klingons in a battle to death, wouldn't you expect at least the Klingons to be shouting battlecries, injured people to scream in pain etc.?
Or at least for someone to make a snarky comment while vaporizing the enemy?

The only thing you hear during a ground battle is weapons fire, those people must have awesome discipline. I wouldn't have expected that from the Klingons and Orion pirates at least! (Though I could picture the Romulans as silent evil buggers)
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you hear the scream as they fizzle. its faint but its there
i wonder how many Sims the devs have killed in their time?
Things like, "incoming message" or "on screen" or "beam me up" would be great. I know there used to be an option for player/BO voices that was taken out before release with a hint that it might return later. I wonder if those are intended to be something similar to that.
I was just posting on Footstep sounds when I saw this thread and it reminded me. WHERE ARE THE DEATH SCREAMS?!?!?! I want to hear them Klingons choke on their own blood and scream as they are vaporized.
My crew hampels around to much
Which brings this to mind:
http://www.youtube.com/watch?v=TcgWp1Mf504#t=3m19s
At very least 5 maie and 5 female voices for every skill (one for each BOff), then some variety in combat situation small talk.
That could get rather expensive.