I and II
When I ran Fish Creek, it was in the II or less category. But, to be clear, I'm not talking about the East or West branches of Fish Creek, which are boulder gardens and best left to kayakers wrapped in three foot layers of nerf material.
Most of the rest of my paddling locally has been on flat water, since I often paddle with my wife. There are reservoirs that feed the Erie Barge Canal (like Lake Delta), the canal itself, the original Erie Canal, the Mohawk River (a nice run from Lake Delta through the city of Rome). There are also a number of other canoe friendly streams, especially in later Spring.
Of course, if you extend the travel time, there's the entire Adirondacks - the Moose River is fun, Nick's Lake, etc.
Mike H.