You don’t have to call yourself a cis-male. You can call yourself a human. You can call yourself Alex. You can call yourself a dude, a bloke, a guy, a chap, a bro.
The ONLY time when I’d ask (not demand, not force) you to describe yourself as a cis guy, a cis man, is when comparing and contrasting yourself with another guy, a guy who happens to be trans.
Within that particular framework, if you were to say, “well, normal guys are…” or “trans dudes are great, but I’m my own case, as a man…”
That, my friend, would be douchebaggery. That would be transphobia. Because you’d be implying that trans men are not men.
I hope that clarifies things.