Roger Delgado The definative Master. Full of charm, yet still deadly as a snake.
Anthony Ainley - He hammed it up at times, but he got the job done when they gave himn a break from mustache twirling. Its a damn shame he didn't live to do any audios.
Derek Jacobi - I could watch him read the phone book. A pity they couldn't keep him on for at least one full story.
John Simm - Sorry guys, I liked him (even though in my reality, I would have tapped Anthony Head for the part, but ah well).
Peter Pratt/Geoffrey Beevers - Was never a big fan of the corpse Master. Sorry.
Eric Roberts - Ugh, the less said the better.