what is good for one is not for the other. A great BJ needs a good dick to start with...average sized, sparkling clean and with the hair trimmed or shaved for enhanced pleasure for the guy and more satisfying sucking for the woman. I don't like to stop all the time to pick hair from my teeth or add some to my fur ball. Neither I like to smell anything but clean and fresh skin when I go down. A great BJ involves ALL of our senses: Vision, Smell, Touch and Taste. I always tell my clients if they want a woman to go down on them looking at their hard on  and have her mouth watering in antecipation, they need to present their dicks in the most appetizing way...A well groomed dick (don't forget to have your ass groomed as well) just say "suck me" to a true cocksucker.
Try them all...every  one has her own style and techniques