Wow - can't believe how hard this has been already!!
TS:
Boma - Because it is so "different" with the flavors and offerings, and yet "not weird" so that picky eaters won't have something they can be comfortable with. Love Prime Time, but i'ts been a long time since I would blow a whole day's admission just to eat there, especially not now, so I think (just for me) it suffers from "Holllywood Snoozios" Syndrome. Would much rather wander around the glorious AKL after a meal.
Crystal Palace - Pretty atmosphere, and very good food the times I've been there. Plus fun and relaxed character interaction. Like I've said before - have had several "just meh" experiences at CG, and feel it is totally overpriced. If not for the view, I personally would probably never go there again.
Aloha Isle - Have changed my mind on this one. Have not eaten @ BOG, and would normally go with a place that has full meals vs. limited offerings, but when I think of "iconic" and "world renowned", got to go with something everyone I've ever spoken to remembers about WDW - the Doles!!
Columbia Harbor House - As I've said before, it's so nice to escape the hustle and bustle of the MK on the 2nd floor of CHH, and it's great for people watching, even if I do wish they had an elevator to get up there (especially now that I walk with a cane, which makes it harder to manage a food tray, etc. with one hand pretty much taken away) but that's probably what makes many less guests go up there in the first place.
Sunshine Seasons always seem loud and chaotic to me, and I had a pretty bad experience there years ago when I first had the dining plan, and it's made its mark on me, unfortunately.