Opposite this and you will find quirky.
A word often used by narcissistic scenesters when they describe their oh-so-unique selves in their Livejournal user info pages in attempts to sound like interesting people.
It is a word best used by one person to describe another. Those who apply "quirky" to themselves thereby call into question their very own "quirkiness" by seeming gleefully self-aware (just like everyone else).
Having a peculiar character. Standing our from the crowd for the sake of it.
Eg Always eating burgers upside down.
Playing the piano whilst everyone else is socialising.
Doing a rubix cube. (3X3? oh no? too mainstream... 4X4, if there was such thing as a 2 X 4 X 3.5, would probably do that)
Having a toy dog that you always scratch in the same place.
Occasionally sporting the one eyebrow look.
Buying stationary 50 at a time.
Buying the "Breakfast at tiffanies" sandwich.
Why does that guy have one red sock one blue? He's a quirky little bastard.
Why is that guy boiled the water when making his squash? Cool water is too mainstream! Ahh he's a quirkster is he?