You see, the secret, I felt - and I have always felt, as an advocate - is to find a memorable but simple phrase that will stay in a jury's mind, that they won't forget easily, and that sums up for them graphically exactly the impression one hopes they're getting about that man from the evidence.
To paraphrase the old saying, a facial impression is worth 1000 words (and it also has the convenient feature of not being persuasive evidence in court).