There is nothing strange or weird about that at all. You're a Disney freak, and therefore a Disney Destination is your favorite vacation of all. It's natural to be more excited about that trip than another.
Of course, I hope and trust that you still enjoy your Alaskan cruise. One can love Disney the most and still have fun at other places. I'm sure that'll be the case for you too.
I'm going to enjoy the cruise. I think I have some anxiety because I have never been on a cruise before, and there is some drama surrounding the wedding that is taking place during the cruise. At WDW I know what to expect.
I love going to WDW, and I get more excited about that than I do for a Disney cruise. However, I cut my April WDW birthday trip from 8 days to 3 days so I can go on a Princess Transatlantic cruise. I love Alaska, too, and will cruise there for the 4th time this August on Holland America.