mellow
complacently
insouciant
cool head
right
right-thinking
unsanguine
shandy
sweet summer child
tame
mellow out
toadly
melt
phlegmatic
butter wouldn't melt in someone's mouth
big
class act
low
untumultuous
staid
yokel
pococurante
cucumber
have been around
meek
exanimate
noninpatient
fledgling
sophisticated
cool cat
all there
moderate
mild-mannered
well
demure
imperturbability
on the up-and-up
square
four oh four
ripe
pissbaby
unprotesting
greenly
brainiac
forethoughtful
nonparanoid
ungrown
lowly
nondeist
zen
biddable
old head on young shoulders
nonpositivist
undismayed
uncongeniality
ungainly
bindaas
nondescript
good-natured
gay-ass
dry behind the ears
inerudite
Pollyannish
true-hearted
sober
hypomature
wastoid
nondeterminist
douce
Dalek
toward
handtame
blue-eyed
rock
chalant
inemulous
cool
clear
misregardful
collected
wordless
thick as champ
gadling
maturability
fall off the turnip truck
shareef
unbefogged
freeheartedly
nonpsychotic
spirited
uninquisitive
undauntable
middlebrow
bucking bronco
unvoyeuristic
ingenu
nondissident
nonvoyeuristic