There are only two styles of portrait painting; the serious and the smirk.
Source: Miss La Creevy, in Nicholas Nickleby, ch. 10 (1838 --9).
-- Charles Dickens, (Feb 7 1812-1870), English novelist, dramatist; He was one of most prolific and popular English novelists, e.g., A Christmas Carol, 1843 & Tale of Two Cities, 1859.