ahhh, your first time...you have no idea yet what wonders are in store for you in paradise! not just the scenery, but the warmth of the people are what draw me back time and again. My face hurts from smiling so much, and it takes a week for me to stop adding "yeah?" to the end of my sentences once I return to the east coast.
Although I have not been to Maui yet, I concur with the way Dave describes the other islands. Each one is marvelous in it's own way. One week is not enough, but it you can swing 10 to 12 days, it makes a big difference in what you can experience, plus airfare will be cheaper if departure/return is on a weekday.
First trip was to Big I for 12 days, put 1200 miles on the rental car and loved every busy minute of all the things I did! From golfing to hiking to the Green Sand Beach, to seeing lava flowing into the ocean, creating new land-this island has something for everyone. The Hamakua coast drive has lush landscape, and the best beaches are Hapuna, and the Mauna Kea Resort's beach. You can even see turtles on the black sand beach at Punalu'u!
Second trip was to Kauai for a week with a weekend on Oahu. Kauai is so beautiful and green compared to the Big I-recommend heli tour for so many things you can't see by car (NaPali coast in particular). Oahu was fun, hiked Diamondhead by myself with a broken toe, was worth the view at the top. Traffic was horrible, but expected that in Honolulu....North Shore had the OP Pro Men's surfing, last day of competition had the smallest waves in 35 years-go figure:annoyed:
Third trip was with friends I met online at Hawaii.com forums-the annual event where we travel from across the country (and the world) meet up with each other. Left the ex at home this trip and had the best vacation of my life! Oahu for 9 days was much better, as I got to see the east and north sides of the island-so much beauty, especially Lanikai Beach!
4th "trip" was a 7 hour layover on Oahu at the end of a trip to Australia. Saw Pearl Harbor-very somber and informative.
5th trip is to Kauai for a week and Oahu for a long weekend this August...can't wait to see some things I missed the first time because I broke my little toe while surfing with 3 days still left. I want to try ziplining, and hike the first part of the Kalalau trail on Kauai. On Oahu, hope to surf if the jellyfish arrive late, and finally go to the Polynesian Cultural Center. Plus hit the shrimp trucks on the North Shore!
Your possibilities are endless....have a great time, whichever island you pick!
Best thing to do is get the books from the "Revealed" series-great advice and directions to so many things you wouldn't get to without their directions.