Actually faithful adaptations of Greek myths. Especially that of Perseus and Andromeda, as neither Clash of the Titans does justice to its source material. A really good Heracles (not Hercules) film is long overdue, too.
Gore Vidal’s Caligula as his author envisioned it, with realistic Roman architecture and costuming.
The unmade Nottingham script. Oh boy, talk about a missed opportunity.