Hawaii is the perfect place to ride, in my opinion. That's where I learned to ride, in fact.
There were a bunch of guys that used to meet at Ala Moana park on Sundays. We'd ride around the whole island. Some of the guys were idiots, some were pretty cool.
There are a few places on Oahu (the main island, with Honolulu) where the ride is really special... you can go for a nice slow tour past Maka Pu'u beach near Waimanalo, see the beach, rocks, waves and some waterfalls on the hills.
Used to be (and maybe still) that helmets were NOT required in Hawaii. Well, riding without one is dumb, but there's something really free and refreshing about riding without a helmet. I'm against it, but I have and it's great!
I have nothing to say about riding in Hawaii but Excellent, Excellent, Excellent!!!!