What started you enjoyment of sucking cock? Did you start taking the load in your mouth right off the bat, when you first starting sucking cock?
I swallowed the first time I sucked cock, and I'm pretty sure I've done it every time since. It made the whole experience for me, feeling my buddy's body tense up (I like to massage guys bodies and balls while I'm sucking them) and his breathing change, hearing him moan and grunt and sigh as I felt his cum spurting into my mouth and his cock pulsing and throbbing as I continued to suck him. It was euphoric to give him that pleasure and to get to swallow his load.
After that I swallowed his load every time he needed to be sucked off, and swallowed the loads of the other friends who needed it or just wanted to try it (unless they just wanted head as a warm up for fucking my hole). It helped a ton that I'm down to suck (and truly enjoy it) without any reciprocation; many of the guys I sucked off then - and especially once I got to college - identified as more straight than bi or gay (or at least they did at the time; I never really questioned that because it didn't matter to me).
So they'd get to just lay back and relax, and close their eyes or watch porn, knowing I was gonna make them feel good, make them cum, and swallow their loads, all without having to do anything "for" me. My pleasure came from doing that, bringing them over the edge and giving them relief, and getting to swallow their cum. Since then it's always been a thing I've done, enjoyed and an essential part of sucking cock IMO.