I've noticed that leadership tend to have cameras on and non-leadership tends to have cameras off. I don't know what the mindset different is there, but it kinda sucks for someone like me.
I often assume that people with the camera off aren't paying attention, and that's probably not something that you want others to think of you.
I do think that visually seeing people can create a stronger sense of connection than with just voice.
Also, as a hearing-impaired person, reading lips really helps, and if I can't see your lips, my understanding of what you're saying is impaired. So, I guess... consider turning your camera on.