Sometimes you get an idea of an actor, a writer, producer, whatever, and when you see their name attached to something you wouldn't have pegged as their element, it can be surprising, or annoying, but most of the time it changes the work and the person for you.
Finally noticing Dario Argento's name in Once Upon a Time in the West did it for me. Or, the moment I realized Parker Posey's been in three different comics-based movies that aren't even from the same company/franchise. Abel Ferarra's Body Snatchers remake, which I'd been actively avoiding, as a movie, until I realized who wrote the script and that Ferarra directed it.
So what/who is it for you? Who've been the big ones?