I have become increasingly estranged lately from the "open collar" phenomenon that has gripped the planet since the beginning of casual Fridays. This is where a suit is worn with a shirt that does not have a tie or the top button done up. In nearly every case, a man can look far better with a tie or even just with this button up.
I will agree that there are some versions of this style that looks snappy. I have a couple of shirts that do look OK like this and I attribute it to them having more of a "sharp" collar. For example (try to ignore the douchebag):

This is OK. I mean I personally would prefer to see it with a tie, but it still looks sharp.
Unfortunately most people in business that I have seen (CEOs, upper and middle management etc) wear it more like this:


Again. Douchebag, and for more than just his dress sense.
The collar is too small, it looks bent and out of shape. Not to mention the fact that it would probably choke him if he did it up. This kind of style is commonly created with button down shirt collars as well (shudder). They look terrible without the top button done up.
The above pictures of Mark Bryers show what a lot of people in NZ are now wearing, I see it every day. It seems to me like becoming CEO or Upper Management means that you're now entitled to lose the tie, lose the style, not give a fuck. For people who can be faces of the company, it would make a lot more sense to me to look sharp.
The problem (at least in New Zealand) is that CEOs want to look as if they could be your average, friendly, approachable douchebag that can relate to the common man. The paradox is generally in the way they act and also the fact that they are most definitely NOT the common man. That and that it's very difficult to maintain a professional image as well as a leisurely look.
I digress...
It's not just wealthy business men that fuck it up with this collar choice. Here's a picture of Brad Pitt and George Clooney with it too:

These two are generally regarded "warhorses" when it comes to menswear in Hollywood. They both normally opt for classic Tuxedos at awards shows and are sharp in leasure suits, casual wear as well.
Pitt's is better than Clooney's crumpled heap of fabric but is still pretty shocking. Sure, they may be in some tropical country but that doesn't mean style has to lose to practicality or that I have to like it.
Undoubtedly the worst version of collars are the ones that go over the jacket like some kind of Tony Montana wannabe:

I would never be able to take anyone that wears this kind of collar seriously. Admittedly, the worst part of this photo is not the collar or even the douche wearing it, but the diabolical fit of that jacket. Jesus Christ.
Anyway.
Here is the counter argument for an open collar:

Gary Cooper. Game over.