For me the eroticism of sucking a guys cock and having him orgasm is exciting. His cock twitching and spasming when he shoots his cum is exciting know what he is experiencing. I’ve not tasted a bad load yet. I guess I get caught up in the moment.
I'm like you, I haven't tasted anyone's cum, but my own and I think mine is delicious!!! My precum is a lot sweeter and much more "tasty", but my cum is still good!!!
I have those fantasies quite often myself because of the fact that when I was much, much younger I could actually suck my own cock. So I know what it feels like to have my "throbbing cock" cum in my mouth and I loved it. I know I'm not limber enough to ever do it again so I fantasize about other cocks!!
I'm like you, I enjoy having the opportunity to make him cum and never focus on the taste of his cum. I've rarely said a word about the taste of a man's load of cum unless it was a very sweet tasting load, that kind I want three or four times a day.