That's quite interesting, I do find observing and watching to be also quite engaging... for me it is less the visual, but also listening to music (well, in rehearsals and performances...), which sometimes gets me in trouble, as I will laugh at something that caught my attention!

My kids (well, more so the older one) seem to be also like that... she loves to stand back and watch. Really paying attention to little things that are happening... for a while we were a bit worried that she wouldn't interact with the other kids, but it isn't a problem!