Hawaii is a place worth of repeated visits. It is not meant to be consumed in only one trip. I've been to Hawaii twice. The first trip was on the The Big Island in August 2009. In my view this is the best of Hawaii, for its live volcano, otherworldly terrain, hidden valley, and awe-inspiring fjords.
Where are the top attractions?
Mt. Mauna Kea, sunset and stargazing
Pu'u 'O'o, lava flow
Helicopter ride, viewing The Big Island from the sky
Kilauea Iki Trail, volcano crater
Hiking on Lava
Waipi'O Valley, hidden paradise