WordNet sense 1 (subject to sharply varying moods):

temperamental

WordNet sense 2 (effusively or insincerely emotional):

maudlin, mawkish, mushy, sentimental

WordNet sense 3 (characterized by emotion):

emotive, affective

WordNet sense 4 (extravagantly demonstrative):

effusive, gushing, gushy

WordNet sense 5 (given to or marked by the open expression of emotion):

demonstrative

WordNet sense 6 ((of persons) excessively affected by emotion):

excited, aroused, worked up

WordNet sense 7 (troubled emotionally and usually deeply):

agitated