Ridiculously colored mirrored sunglasses are one of the best ways to look cool, while still not having anyone know at what you're looking. I'm a huge fan of them, and am slowly but surely beginning to collect various styles and colors of mirrored sunglasses.
When it comes to reflective lenses, I think it's better to stay with round frames or aviators. Wayfarers with blue mirrored lenses just look like the freebies brands give away as promotions. Ray Ban and Illesteva are the best if you're going for brand names, otherwise BP at Nordstrom or Urban Outfitters have some great inexpensive options.
The Dior So Real sunglasses look pretty ridiculous on me (my edginess level is not on par with these glasses), plus they're a whopping $600 (no thanks). But, there are a few people around campus I've seen sporting these glasses (kudos to them) and they're really cool.
I tried on the pink reflective Ray Ban aviators the other day and I am not kidding when I say I believe in true love after this encounter. I have had the blue version for three years now, they're a staple in my constant rotation of accessories, however holy wow the pink ones are fun AF (so are the green ones, a close second, but guys PINK). I immediately texted my brother and tried to coerce him into getting them for me as a graduation present. He didn't say no. Updates to follow.
If you're not into spending a lot of money on real Illesteva's, I found cheaper lookalike at American Eagle the other day. Much better if you're not as responsible with nicer sunglasses (says the queen of irresponsibility with nicer sunglasses).