Or do you prefer published ones?
I ask because a question in the Cosmopolite thread reminded me of an attitude I've seen elsewhere, of what looks like people waiting for an official resource. For myself, careers are pretty easy to knock out. The greater labor would be in a custom life events list, and that's more where I find the supplements useful.
And what are your reasons? For published-only, is it balance? Just avoiding "sweetheart" custom careers? If you're a player, is it easier to point to a published product than ask your GM, "hey, can I have X as a career?"