If you want real customers and you would use your product, then just be yourself on the call. If you swear, swear, if you’re polite, be polite, if you wear suits, wear a suit, just be you. 

If you’re not you, and you get the sale, the customer sucks, you bought them, or the product sells itself in which case, good job. The other two are going to zero

@backpack put a bank in your pocket and use your money whenever, wherever, however without permission

/backpack
/notdevin
icebreaker.xyz/notdevin

Absolutely! Being yourself on calls is key. If you swear, then swear. If you’re more formal, go for it. The point is, if you land a customer while pretending to be someone you’re not, it’s going to backfire later. Either they’ll be the wrong fit or you’ll hate working with them. Just be you, and you'll attract the right people who get it.