In Act IV, Scene 1, Rosalind tells Jaques that she has heard that he is a melancholy fellow, and Jaques concurs, describing this aspect of his personality as different from
"the scholar's melancholy, which is emulation,
the musician's, which is fantastical,
the courtier's, which is proud,
the soldier's, which is ambitious,
the lawyer's, which is politic,
the lady's, which is nice,
the lover's, which is all of these (lines 10-15)"
Jaques tells Rosalind that his melancholy is uniquely his own, and drawn from his many travels.