A very special kit for me was from the first Hornets game I saw - all white, with the red and blue hoops across the chest (other, more knowledgeable Hornets fans will have to tell you the order of the hoops).
Other than that I like basic, traditional designs - Australia, the 'proper' GB and NZ.
However, my all time favourite is the PNG kit from the 1987 British tour (as shown on the Rothmans Yearbook 1988-89, which I have in my grubby paw at this moment). Traditional, bright colours and very dignified.