Is it okay to have a heart at the end of your signature?

I've had the same signature for over 10 years now - it's on my pport, my credit card, everywhere! My signature is my name simply written and underlined and there is a heart at the end. How bad of an idea do you think it is to have a heart? I've always had this signature so I don't want to change it and I personally think that people either don't care or it puts a smile on their face. For tax purposes, my work has asked us to put our full signature instead of our initials when writing receipts and I'm worried it will bother my manager to be giving everyone a receipt with a heart on it. What do you think? I'm 21 years old so I'm worried he'll think that it makes the customers see me as a child. But at the same time we're close and he doesn't take things too seriously... what do you think? Is it a horrible idea to keep it? What would you think if I handed you a receipt and beside my signature their was a heart?