Being the one who receives, I can say that there is a world of difference if the guy can take it all in with ease. There is nothing more wonderful than fucking his face deep into the cavern with your cock increasingly surrounded by warmth and heat the deeper you thrust. But if he gags and tries to pull out of your cock, that moment the thrill dissipates. I do agree it is both technique and attitude. The guy has to be able to take it in with ease and enjoy it.

A friend has a 9" that is medium thick and curves downward. I enjoy the feel of him getting harder as he goes down my throat to the point it is a little more effort to make the turn to go down my throat. I then bury everything he has then hold it as long as I can hold my breath. What a high. He cums so much in my throat that I feel it oozing around his cock back up my throat. I then swallow while I come back up his shaft as he shoots more in my mouth. I take it back down completely to feel him do his final pulses. Hearing him groan with joy makes my day.