unconventional (adj.)

• abnormal
• affable
• anomalous
• beat
• breakaway
• casual
• cordial
• crank
• cranky
• crotchety
• degage
• deviant
• different
• divergent
• dotty
• easy
• easygoing
• eccentric
• erratic
• exceptional
• familiar
• fey
• flaky
• folksy
• freakish
• fringy
• funny
• gracious
• heretical
• heterodox
• homely
• homey
• idiosyncratic
• informal
• irregular
• kinky
• kooky
• loose
• maggoty
• maverick
• natural
• nutty
• odd
• offbeat
• offhand
• offhanded
• original
• peculiar
• plain
• queer
• quirky
• relaxed
• screwball
• screwy
• simple
• singular
• sociable
• strange
• twisted
• unaffected
• unassuming
• unceremonious
• unconstrained
• unfashionable
• unnatural
• unofficial
• unorthodox
• unstudied
• wacky
• whimsical