I use both a low profile clear and low profile black mask.
I like the black mask because i get a "tunnel vision' effect. The mask i have is made by healthway or oceanic, its the tear drop mask that you see most of the Navy Seal's wearing.
There are con's to wearing black. I have missed out on a few unique opportunities where i didnt see something because i had a black mask. For example, this one time i was doing a deco hang from a lift bag at 30fsw and a bull shark had swam between my legs & fins. When i got back to the boat, the other tek divers were like 'i cant believe you were so calm when that 12ft bull shark swam through your legs". I was like "what shark"?
The pro's to wearing black masks is i find they last longer, are less prone to damage, are cheaper and when you tek dive it seems black or red are in and fancy colors are saved for recreational diving.
I like the clear masks. I find them more comfortable to wear and you do get a wider view of the ocean. Its like sticking your head out of the window to see the scenery instead of looking at it from inside the car.
But, the cons are my clear masks are prone to breaking, dont last as long and cost more money.
Now here is a final comment....
My clear US Divers Rafael mask was purchased in 1992 for about $59. I used it about 15 times a year for cold rhode island diving and stopped using it in 2000. It still works fine even though the silicon turned yellowish and the strap retainer broke three times during those 8 years. But, i only used it for about 100 dives.
My healthway/oceanic navy seal style black mask i bought in 2000 for a cost of $24 (yeah didnt realize the navy buys this mask not for performance but because its cheap and can be discarded when they reach shore). I have used it for over 500 dives (mostly technical) and many hours of snorkeling. It still looks new today and i havent had any leaks or anything broken on it yet.
So i'd gotta say from this experience, that black is better. But, i still love the clear