I have very ambivalent feelings about portraits of people. Now that photography has evolved into such an art form and the quality has improved by leaps and bounds, paintings in oil, or guache or watercolours all seem inadequate, unless abstracted à la Francis Bacon. In future, if asked my opinion on portraiture, I would recommend David Michalek, whose hyper-slowed down digital-video portraits, some life-size or larger, can last ten minutes or over an hour.
"They look like stills until you see the smallest movements. When you realise that what you are looking at is slowly metamorphosing, it is like watching life itself" - Quotation from the Financial Times