Yes. At least in genjutsu, you'll be able to sense that it's an illusion. It won't feel real in the same way. And it can end at any time. We might not have the same control otherwise.

[Finishing off his food, he licks his thumb to clean a speck of sticky rice, eyes still fastened onto Cy with full attention.]

You can also decide how you'll appear. I don't want to make that decision for you.