Chef Mickey's & 1900 are Character meals. If you're staying at Contemporary/Bay Lake, then I'd suggest Chef Mickey's (but it can be noisy). If you're at Grand Floridian, then 1900 is gonna' be a bit easier for y'all.
Kona & The Wave are not Character meals. I never been to Kona, but The Wave is known to be the amongst the 'crunchiest' food places at Disney - they serve organic & whole grain stuff. More recently, The Wave introduced a buffet that I've not yet experienced....we like The Wave because we stay at Bay Lake Towers next door. I've heard nothing but good things about Kona, but it's not worth traveling for breakfast with my family. Matter of fact, we like room service for breakfast.