My sister and I spent last week on the Big Island. For context, we are both in our 20s and travel together once or twice a year. Although I travel a lot (60-65 nights in the past year), this was our first trip to Hawaii. While I'm sure every island has wonderful aspects, I think the Big Island was the perfect choice for our first trip.
Both of us were traveling from the east coast and my sister in particular was thrilled to escape the winter cold. We had great luck with Hawaii’s weather: very little rain (and even then, typically 4pm or later), no vog, and high winds on the last day but not any other time during the week.
Due to the time zone (6 hours different from home), we were up everyday by 5:30 or earlier (!) and in bed around 9pm. We had a lot of daylight available based on this schedule and long days of touring.