I like the shifting sands scarf by Grumperina:
I like the Miranda scarf from the smariek knits blog even more:
Very masculine, I think, despite the name.
Also, I think that the farrow rib makes a very interesting scarf, a little more oomph than your usual ribbing, and good for men.
Here is a link to a photo of the farrow rib, it it a really terrible picture but I can't find where I put the better ones. Done in Knitpicks Elegance in Coal.