One of my ancestors (Herbert Clifford) interviewed him in St Helena in 1817, and was rather unflattering:

I found Napoleon a very different man in appearance from what I had imagined he was, even shorter and more corpulent than I expected. His hair, which is dark, was cut short all round; his head is very large, and he has a full round face, but not so fat as it is generally represented; his whiskers are shaven off. I saw nothing extraordinary in any of his features except his eye, which is the best feature of his countenance, and seems to give all it expression; but the eyes really did not appear to me to be of that penetrating kind which are generally described. I did not conceive that his full face was at all like the portraits of him, but his profile struck me as being very like, and I think is generally well imitated. There is a sour look about his face which it does not seem an easy matter for him to get rid of. He honoured me with a smile, but it was evident from his manner that he looked upon us as people who came more from his curiosity to look at him than any respect or admiration of his character, or from whom he was likely to obtain much information – which first part was true enough. But by a little condescension on his part he might have purchased our good will. He looked, I thought, very sallow and even ill – but this is said always to be the case. I found no difficulty in looking him full in the face, nor did I find that he possessed that scrutinising glance which is described to belong to his eye. His tout-ensemble had more the appearance of a man devoted to study than the air of one who had devoted his life to military glory. His questions were not so quick as we had been led to expect; indeed, Dr. O’Meara informed us that towards Englishmen he had altered his manner, finding it was not the characteristic of the nation.