My sans serif typeface of the moment? PF Handbook Pro. It's cool, calm, and collected, with just enough quirkiness to make it lovable. (Kinda like myself, no?)
The quirkiness kicks in with some of the lowercase letters like g, k and m—giving me unique little details to love. The fonts range from extra thin to black, and while I would probably use the regular weight for most uses, I always really enjoy a good light weight font, for some reason.
Here's a sample of PF Handbook Pro Extra Thin, PF Handbook Pro Italic, and PF Handbook Pro Black:
Isn't it beautiful?
It's been a popular typeface, and understandably so— smooth round corners, legibility at small sizes, fourteen fonts in the family, and stylistic alternatives. It would be great for almost any usage. It's modern, but not necessarily trendy, which I consider hallmarks of a classic typeface. What's not to love? And since MyFonts also makes a web license available, I just may pick this one up for my next web project. Oh, the wheels are a-turnin'...