I saw it first time round and found it very interesting - and rather sad.
I loved what he said to a reporter "Everyone wants to be Cary Grant. Even I want to be Cary Grant."
I thought he was gorgeous. I have to say, though, that I too watched "To catch a thief" the other night and thought it was dreadful, (though I think a lot of his other films were really good).
I've got another 'keen'... Ouch!