Honestly, I can't recommend Ralph Brennan's Jazz Kitchen.....in my opinion, the portions are WAY too small for the price of the food. And last time I was there, even with reservations, the wait was ridiculous and the service was absolutely horrible. It's very seldom that I get such poor service that I do not leave a tip, but this trip I did not leave a penny tip.
I second Redd Rocket's Pizza Port....good variety and plenty of seats. Another one I can recommend is the Plaza Inn. The portions are very large and can easily be shared if you're not big eaters. The only problem is that it tends to be crowded during prime lunch & dinner hours.
The Carnation Cafe is another good choice but it's small and the wait can be long during prime eating time.
Most people give good reviews to the Blue Bayou. I guess I'm in the minority because I don't recommend it. In my opinion, the food is only mediocre, which is surprising since it shares the same kitchen as Club 33 (so I've heard).
The DTD restaurants are mostly pretty good. I like the Rainforest and the one next to the Uva Bar that I can never remember the name of. I haven't tried the newer Mexican restaurant yet. ESPN is good, but slow.
Another character dining I like is Goofy's Kitchen in the
Disneyland Hotel. Make sure you're really really hungry though......