I don't do any buffets, it's nothing against buffets, but buffets with kids are just not my preferred way to enjoy vacation.
We tend to do breakfast over other meals, mainly because my kids will eat their weight in breakfast foods.
Our favorite character interactions have been at Topolino's and Garden Grill. I've done GG for both breakfast and lunch but I haven't done breakfast since before COVID.
If you like Stitch, the breakfast at Ohana is fun.
Once my kids are older and can better manage buffets, we'll add Tusker House back into the mix. We went when it was family style post COVID and loved it, but I understand people who were used to the buffet didn't.