I'm all about unique prescription glasses at the moment. I think that they can instantly change up your look. If you are short-sighted like me and you don't need to wear glasses all the time, it's a great accessory rather than necessity.
I find the offerings in 'well known' high street opticans to be quite generic looking and then the online offering are often of cheap quality.
The best way to get unique and quality glasses are to buy them from an independent brand (mine are from Spitfire) and get your prescription lens fitted (reglazed) elsewhere. I got my done when I lived in Korea where it's so affordable and easy to do so. However in the UK the well known opticians are reluctant to offer this service, but upon researching I have found a few online companies offering reglazing services. Check them out here, here and here.
Something tells me that independently owned opticians will offer this service too but I haven't found one yet.
Of course if you are into wearing non-prescription glasses, then everything I have written so far is...well...a waste of time.