firm, constant, consistent, of settled temper or mind, resolute, determined, persevering

taking to bad habits

amorous, having the disposition of a lover, amorous, ladies' man, Don Juan, squire of dames

lose temper

bad-tempered

the one who does for enjoyment, luxurious, cheerful, fun-loving, luxurious, flirty

barbarian, savage by nature

knowing (or one who knows) the temperament or constitution

affable, decent, courteous, well-behaved

lunatic, frenzied, obsessed

to give a title for something, entitle