Besides loving the word quirky I think it is a great way to develop a character. Create a list of quirks that you observe in yourself and others for use in one of your characters.
Shakes his hands and stands on his toes when he is excited.
Buttons her shirt wrong on purpose.
Continuously flips the remote from channel to channel, never really watching anything.
Pulls her hair behind her left ear over and over when she talks.
Still collects action figures but hides them in a shoebox.
Clicks her tongue when she's watching T.V.
When she is uncomfortable in a social situation she yawns.
She collects the plastic closures of loaves of bread.
What are some of your quirkiest quirks?