delwyn1 raises a fair point:
How much control will you have to make Galactic Civilizations III run the way you want it to?
For me, at this point, mercaneries are pretty irrelevant so I'd like to be able to, at the Game Setup screen (or whatever it's called), set Merceneries to None or at least Rare. It doesn't really bother me that one of my ships finds a Bazaar by Round 25-or-so but going through the obligitary "what would you like to buy"/"i'm not interested yet" (not anything like the exact communication, but that's the general idea) is a bit of a drag.
If I've got one major complaint at the mo, it's how other AI races seem to get some Galactic Wonders amazingly quickly. I'm finding it way too hard finding the resource that a particular Galatic Wonder needs and all of a sudden Mr Weird Robot tells me "some unknown civilization has built (insert random Galactic Wonder here)"...