Fuji 35mm f1.4
One of the original lenses released with the introduction of the X-Pro 1 the 35mm f1.4 has become my most used lens. It is slightly slower to lock focus in low light than the 23mm f1.4 or the 56mm f1.2 and makes a bit of a 'rattle' when hunting for focus. In good light these problems are non existent and I have become accustomed to them in low light so I don't really see them as a deterrent to buying and shooting with this fantastic lens.
The lens is small and light weight and as with the other Fuji primes, produces extremely sharp images with beautiful falloff when shot wide open.