We are from Orlando so we frequent WDW, but we vacation to DL... Hubby and I very rarely make any reservations at DL. Here are our favorites when we are there...
At MK we like to have lunch at the French Market (between Pirates and the Haunted Mansion)...it is a counter service, but the food is great, we actually do that the very first day as soon as we get off the plane we head right there. We also like Blue Bayou (you should make PS for this if you want to go, but it is not always needed). It is a nice restuarant also in New Orleans Square by Pirates, if you have been to Epcot it is like San Angel in the Mexico Pavillion. It is "romantic" as you stated, but it is also pretty cool, it is along the Pirate ride, so you can see the boats floating by, the food is excellent and we always see kids in there, so I would not worry about that. We have eaten at Redd Rockets Pizza Port as well, although I have to be in the mood for Pizza, it is a good one as well.
At DCA we like the Wine Country Trattoria kinda in the middle of the park, it is a full service, sit down restaurant, but we have never needed a reservation, it is very informal, outside or inside seating, to me it is like a quick service dining but with a server, if that makes sense... We also like Taste Pilots Grill (over by Soarin') for a quick service for basic burgers, chicken, etc.
When we are there, we tend to have a quick breakfast (I am not a huge breakfast eater) a quick service (or the Trattoria for lunch) and then we have dinner at one of the hotels.
At the hotels, we LOVE Storytellers Cafe at the Grand Californian (for any meal) we have found breafast (which is character) and dinner need a PS but you can usually walk in for lunch, there is a park exit/entrance to/from DCA at Grand Californian, you can use that entrance to go to Stroytellers from the park, it is very easily accessible. At the
Disneyland Hotel Goofy's Kitchen is always fun, you would need a PS (it is like Chef Mickey's at WDW), buffet with characters. At Paradise Pier the PCH Grill is great for any meal as well. Breakfast is a character dining so a PS would be needed, you could walk in for lunch (no characters) and Dinner depends on the time (also no characters) PS would be a good idea but we have not always needed them.
DTD is a lot like the one at WDW. The restaurants are Participants for the most part so you have House of Blues, Rainforest Cafe, etc... we don't usually eat there because it is stuff we can have a home. The LaBrea Bakery is really good for Breakfast and we have heard great things about Catal and Naples Pizzeria although we have not tried them.
I hope that helps out a little bit. My biggest suggestions are Storytellers Cafe at Grand Californian and the French Market in New Orleans Square at MK (we never miss these)...