I really think it varies from person to person, and can change depending on the state of the body. Some people lose weight low carb (50g or lower), some people prefer to stay that way even just for maintenance. Some people function best with 1/3 of calories coming from carbs, and that would make others sluggish. I think, ideally, a body does well on a moderate carb level (100-150g, or maybe 150-200g) when it's not super active, but that is for an entirely healthy body with no metabolic or other issues.
I think I want to try increasing my carbs to 100g+ range, I'm just not sure how to do that without eating a lot of white rice. I also don't want to get burnt out on sweet potatoes. I guess that means more squash? I'm curious to see if my body seems to function well at a "maintenance" level at this point.