bemused
brooding
broody
cogitative
considerate
contemplative
deep in thought
deliberative
excogitative
lost
meditative
musing
pensive
pondering
preoccupied
profound
reflective
ruminative
serious
well thought out
accommodating
accommodative
affable
agreeable
analytical
anxious
attentive
brainy
calculating
careful
caring
cautious
charitable
circumspect
civil
cognitive
compassionate
complaisant
concentrating
concentrative
conceptive
conceptual
conceptualized
concerned
contemplating
courteous
curious
decorous
deep
deferential
deliberate
deliberating
delicate
demure
discreet
discriminating
discriminative
earnest
engrossed
able
candid
humble
intelligent
respectful
sober