Of the 3 you mentioned, we have only done Ohana breakfast and we really like it. After going once, it became a "must-do" for us, though I'll admit that some visits have been better than others. It is still on our list every vacation though.
As for other recommendations...it sort of depends. Are you going to be at a park or going to one that day? If so, are you going to be in MK area, EPCOT, AK?
We like Ohana because it is close to MK but we don't have to have park admission. That is also a benefit to Chef Mickey's and Park Faire. We have done Chef Mickey's a couple of times - it is OK, but overall we prefer Ohana. We haven't made it to Park Faire yet, but I've heard great things about the dinner (not sure about breakfast).
We also haven't done Tusker House - but it sounds like a good choice if you were going to be at AK anyway.
There is always CRT at MK if you have never done it. We've gone twice and I actually enjoy the breakfast menu. Yes, it is expensive if you are doing it OOP and yes, it takes 2 credits if you're on
DDP, so it may not be a feasible option for you (taking those things into consideration). If you've never been, IMHO, it is worth it to do once just to be in the castle - I think the dining room is lovely.
At DHS, there is the Hollywood and Vine breakfast - your kids might be on the older end for liking those characters (Little Einsteins and JoJo still I think?) and I don't know about the food. I haven't heard much about this one and we haven't done it in YEARS (since way before it was a Playhouse Disney theme).
Good luck!
