We went last December when my DD was 6. I asked her which was her favorite character breakfast (we did Crystal Palace, Ohana, Tusker House, Hollywood & Vine, Epcot's Princess Breakfast & Chef Mickey's) and she said Tusker House. She loved the buffet and the characters. They did a little parade around the restaurant. I know it's in a park, but this is the advice of my 6 year-old. So maybe consider it for an Animal Kingdom day if you are planning one.
As a little girl, she also likes the Princess Breakfast. But, Tusker House won hands down in her opinion.
Tusker House was mine and DH's favorite too!
As far as resort breakfasts go, since that was your question...
We also loved Ohana (tied for second with Epcot's Princess Breakfast). It was lots of fun and the food/fresh fruit was delicious. We probably won't go back to Chef Mickey's because the food was not as good. Great characters, rushed a bit, but the food was sub-par compared to all the others. We met most of those characters at other meals (except Minnie, which we met at meet and greets at Epcot and AK).
You can never go wrong with any of the character breakfasts (meals)! You're at Disney and your enjoying a good meal and meeting characters at the same time! It's a WIN, WIN, WIN! Enjoy your trip!