I'm seeking a word or phrase which means being excellent at something you hate doing.
For example: I'm excellent at placing labor epidurals in pregnant women, it might even be my best skill. But, it is also one of my least favorite tasks to perform at work.
Dave's skill at placing epidurals is only exceeded by his hatred of placing them. It's a great example of ............
While irony would fit here, I'm seeking a word or phrase that refers to this specific situation. Ideally, it would convey the whole concept of being good at it while hating it.