I didn't register since I get a few freebees per year offered through work and can't usually take them because of time frame or other restrictions. I get a few more offered as FAM's but they won't allow me to take my wife when they offer them (agent only) and they make you follow thier daily itinerary schedule when you accept.
I book and pay for my own cruises just like everybody else. With some lines/ships I don't even get a price break. But I love cruising like everyone here.
Out of curiousity, have you done an NCLA in Hawaii yet? If so, was it as favorable as your other NCL experiences?