I like brains best deep-fried and that strikes me as the brains prep most people would find most edible, especially if you cut them small so there's a high crust-to-content ratio.
That said -- I'm not squeamish about many foods, but a friend died horribly of Creutzfeldt-Jakob Disease and even though it wasn't the mad-cow variant -- brains still squick me out. They seem to me a rather risky food to eat, particularly for people who might be immunocompromised.
They are troublesome to make, but sweetbreads are the offal that's most accessible to most people. If you can get people to try them in the first place, they usually like them, especially the various French recipes, but simply grilled is good, too.