I've had my current pair of glasses for almost two years and i'm finally looking for new ones. I want oversized ones, but I was trying them on at this one store, and the sales person was all like "Those are a fad. If you want a pair that will last more than 6 months, don't get those." And then she showed me all those rectangular ones that everyone wears. So now i'm in a dilemma.
I need glasses to see, but I don't want them to be like a burden to my appearance. I think glasses should add to your look or personality like any other piece of clothing or accessory. Oversized glasses I think look interesting, whereas 98% of the glasses-wearing population have rectangular glasses. Like Pinksatin said, wouldn't rectangular glasses be considered "in" too? So basically if you get oversized glasses you risk looking like a try-hard hipster and if you get rectangular ones then you risk looking like everyone else who is not a hipster.
P.S. Paul Smith and Oliver Peoples have great oversized designs that are still classy. But they're probably only worth getting if you really need glasses.