I am not a fan of most facial piercings. Ears are okay, although the classic simple pierced ears are preferred over multiple piercing on the ears....now some gals can rock it. Noses are generally a turn off although again some gals can rock it.
Pierced tongues can be a turn on...although haven't really found the gal that can truly "work it" well. Pierced hoods....love it when it really heightens the gals experience but sometimes makes them too sensitive. Nips...yep, like it. Navel, no problem there...just not a huge fan of big jangly jewelry hanging from there that can get caught in/on something.
Back to the OP, bull nose rings 99.5% of the time it is not a turn on.