We had a memorable trip to the park and the USS Arizona memorial. The park service staff was helpful and friendly. They made a point of explaining that the memorial was a solem place and should be treated respectfully, like any other cemetary that someone might visit - I appreciated the reminder to our group.
I learned so much at the different displays - very educational for someone whose modern history is lacking. The audio guides were very informative.
Be sure to order your tickets well in advance - there are a limited number each day and should be ordered well in advance.
I also found the Bowfin and USS Missouri interesting but i ran out of steam - it was our first day in Hawaiiand i was jetlagged. If history or the navy is your thing you'll really enjoy it.