Personally? I have always wanted to be good at bee breeding, but never have been. Why? It's super slow in comparison to just going out and getting what I actually need. Bloody Apiaries and frames.
That being said, Doctoral is my desired "I am decent with Bees" accomplishment bee, because it produces Jelly Babies, and I have no idea what they are meant for.(likely noms but they must be super good to be worth the effort, right?)
As for a more realistic choice for me to strive for, a purebred common bee is something I might be able to obtain.