I have to ditto this.

I was introduced to Canes the last time I was in the BR and absolutely fell in love it. Canes tastes even better after you've been at the bars drinking.

To answer the OP, I'm not a real big fast food person, but we do not have the following in Hawaii. Some of these are restaurants and non fast food joints but who cares:

Sonic
Hardees
Olive Garden
Applebee's
White Castle
In and Out (usually my first stop when I'm in California)
Chick-fil-A

IHOP used to be limited to Maui, but we finally got one on Oahu. Krispy Kreme is still only on Maui.

And after greeklawgirl introduced me to this the last time were in SoCal, Roscoe's Chicken and Waffles will be added as a MUST GO TO next time I'm in the area.