Nowadays the term has virtually lost all meaning, since eccentricity is commonplace. So many people - youngsters in particular - are now conspicuous by their strange clothes, strange behaviour, strange beliefs and strange aspirations that they just aren't remarkable any more.
It's routine for people to have elaborate tattoos, multiple piercings, flamboyant clothes and extreme political views. We think nothing of it, we see them as quite normal.
Oldies are more conventional and some will still stick out as eccentrics, like the moany old codger who hates the neighbours, and they're very noticeable oddballs. Oldies in general still go for a fairly orthodox appearance - no tattoos or piercings or tee shirts with controversial slogans.
It was unusual when I was young to see any kind of "eccentric". We might see the odd person talking to themself or cursing everyone in sight or collecting garden gnomes, but that was about it.
The only obvious eccentric I can think of in this immediate neighbourhood is the guy who walks down the street trailing a suitcase. Clearly he isn't heading for the airport because he appears with his suitcase every day. Which naturally sets us wondering what's in the suitcase. The proceeds of a bank robbery? His worldly possessions? The manuscript of a book?
Of course we can't possibly ask him, that would be most intrusive and impertinent. Maybe one day the suitcase will fall open and all will be revealed.

