irresponsible
casually
devil-may-care
easygoing
approachable
blithe
carefree
chatty
free-and-easy
free-handed
freehearted
go-as-you-please
good-hearted
indolent
jocular
jovial
lackadaisical
laughter-loving
light-hearted
pleasure-loving
square-built
sweet-tempered
unfearing
unthrifty
vivacious