McDowell gave a fair rendition - and was perhaps helped along the way by the fact that he bears more than a passing resemblance to the real emperor - or at least I have also thought so. The film could have been handled so much better, however.
Jay Robinson, I have to disagree with. I honestly thought his performance was appallingly over-acted, and he turned Caligula into a caricature, which is precisely the fault Hurt avoided. Hurt, for me, was the best for balance, as he had the humour and the tyranny, and his performance was - in several places - beautifully understated.
And yet, I suppose - the best portrayal has yet to come. Once dramatists ditch the 'insanity' tag totally, we may get a very different, far more chilling character than any that have been viewed so far.
Yes, Augusta, I think you're right McDowell does look alot like Caligula, perphaps that's why they chose him?.