Agree when Givemeabreak says anytime is a good time to go! I came back in September, and it was fabulous. Am heading back in the new year (4th January) and planning to book for just after easter 2008. I usually go 3 times a year a love it.
The evenings are dark early (though not as early as UK, but it is always sunny during the day. The perfect climate (in my opinion anyway)
I will never forget my first visit (back in february '95) We drove to the airport in the cold, dark and snow, and got off the plane to bright blue skies and glorious sunshine......... What a surprise....
Have never looked back and cannot wait til the next visit