One should never generalize. It behooves the writer to avoid archaic expressions. Tell me what you know. Comparisons are as bad as cliches. Be more or less specific.
Understatement is always best.
Placing a comma between subject and predicate, is not correct. Parenthetical words however should be enclosed in commas. Analogies in writing are like feathers on a snake. The Passive Voice is to be avoided. Avoid colloquial stuff.