That's fair, but...
That's precisely what I'm talking about. The Sumerians were not aggressive expansionists. They were only briefly unified under Sargon of Akkad; the rest of the time they were a band of city-states that warred with each other a lot more often than they warred with outsiders. Really what I'd associate Sumer with would be: 1) irrigation; 2) priest-kings; 3) lots and lots of "firsts"; and 4) remarkably honest record-keeping. In game terms, that should mean bonuses to farms with fresh water, some kind of faith bonus, and science bonuses of some kind.
I'm cynical, trust me. I'm just hopeful.
He's boring? That's a personal opinion, yes, but there's simply nothing about him I find interesting. He's also been done to death: he's been in what, five Civ games now? I'd frankly rather have his nephew if we must have a Napoleon; at least he'd be novel.
This, especially since the
Epic of Gilgamesh, while rooted in Sumerian sources, is ultimately a Babylo-Assyrian piece of literature. We don't have Sumer; we have
The Epic of Gilgamesh civilization. It's the equivalent of having Achilles lead Greece with both his leader and civ abilities referencing
The Iliad, with the difference that at least
The Iliad has historical basis.