quirky (adj.)

• abnormal
• anomalous
• arbitrary
• capricious
• crank
• cranky
• crotchety
• deviant
• different
• divergent
• dotty
• eccentric
• erratic
• exceptional
• fanciful
• fantastic
• fey
• flaky
• freakish
• funny
• harebrained
• idiosyncratic
• irregular
• kinky
• kooky
• maggoty
• moody
• motiveless
• notional
• nutty
• odd
• peculiar
• petulant
• queer
• screwball
• screwy
• singular
• strange
• temperamental
• twisted
• unconventional
• unnatural
• unreasonable
• unrestrained
• vagrant
• wacky
• wanton
• wayward
• whimsical