jocular/jocose/jocund

amusing blithe camp cheerful comic comical crazy daffy droll facetious flaky frolicsome gay gleeful happy humorous jesting jokey joking jolly joshing jovial joyous laughable lighthearted lively ludicrous merry mischievous pleasant roguish sportive teasing wacky waggish whimsical witty

morose serious unfunny