Batwolf's best and (the upcoming) worst of '11 gave me inspiration here. What are you best and least favorite O sunglasses? Factors can be based upon: style, construction (the build and look of the frame of course) comfort, and fit (or lack there of) or if you feel they do or don't look right on you at all. This can apply to x-metal or o-matter I'm gonna also draw some inspiration from herb's "do I or do I not suit these?" thread and place this rule in effect: "The Nut Up Rule" - This thread is based solely on opinions, you have to be prepared that someone will not like the same frame you do. Everyone has different tastes, so expect different opinions about them and vice versa. If someone has a slight disagreement with your best or worst, offer the advantages and disadvantages you see with them instead of looking for an argument. With that being said, I'll start off My most favorite would have to be the fuel cell. All different kinds of special editions, color variations, great fit, and just how it looks on me. My least favorite would be monster dog. Very bland and in the special editions they have done, not much was done as far aspecial color way or anything other than the icon. Also they dont sit well on my face either.