Let's see, off the top of my head:
Spartacus - does anybody not love this movie?
Waterloo - one of the only movies that actually makes me cry
Cleopatra- versions with Claudette Colbert and with Elizabeth Taylor
Beau Brummell - horrendously funny
Sally Hemings - Cameron Ejogo - need I say more?
Mary Queen of Scots -with Vanessa Redgrave (the David Rizzio murder scene is in my opinion one of the
best in cinematic history)
Braveheart - got to love those medieval war scenes
Quo Vadis - love this in spite of the glaring inaccuracies in every scene (but of course it is based on the
book which is also bursting with glaring inaccuracies)
Gia - hot lesbian love action
and many more, but my memory fails me at the moment.
In short anything Roman, anything with Peter Ustinov (the man's hilarious!), anything with Angelina Jolie

, and anything at all of historical value.
Nero