The Kitzur Shulchan Aruch states that a person should not run out of shul after Shacharis because then davening will look like a burden to him. If the person is going to the Beis Midrash to study, though, not only can he run, but it meritorious to run to there.
4. Be kind to yourself. Speaking badly even about yourself is unethical.
הלכות שמירת הלשון 