I've been a big fan of Master & Dynamic's headphones from the very start. I have two MH40s so far (I don't know why, but I just do—the black leather/gunmetal metal, and the brown leather/silver metal) that I've been alternately using almost daily when I'm at my work desk and whenever I'm on the go. It's such a beautifully designed headphone, and it sounds great with whatever music I listen to—classical and jazz, pop and R&B, chill and electronic. I also love their headphone stand and boom mic. And recently, I ordered their super-awesome special limited edition Zero Halliburton Kit, so make that three MH40s so far.
UPDATE: I got my Zero Halliburton Kit, and it's awe-inspiring.