If you sent the PayPal as payment for "goods" your address will show to the seller.
If you sent as "goods" and funded your payment through your credit card, you have nothing to worry about.
If you sent as "goods" but funded some other way and the seller never sends you the cue, you will have basis for a dispute through PayPal which you will generally win.
If you sent the payment as a gift funded through a credit card, you MIGHT have a way to go if he doesn't send you the cue.
If you sent the money as a gift and funded in some other way, you best hope your seller is honorable because I think you have paid in a way where you have managed to get zero protection.
Kevin