Interesting post, the replies are all over...
For us, here are some places we have been to at WDW recently (the last few years) and have no desire to go back any time soon.
California Grille - Great Views and for us, that's about it. The place was, in our opinion, over priced, extremely small portions and way too over 'stylized.' Or as my wife would call it Frou-Frou (is that a word

) What I mean by this is tiny portions with little things sticking up in the food to make it look fancy. A lot of people love it. I would try it again, my wife still is refusing.
'Ohana - We went there once about 2 years ago based on the raves. The food was way overdone, the presentation was lacking, the server lackluster. It just wasn't what it was cracked up to be in our opinion. We used to love it when it was the Papeete Bay Verandah. Wish it would come back....
San Angel - What can I say, we get lots of Mexican food here around Chicago. Excellent food.. San Angel seems to us to be Americanized Mexican food at highly inflated prices. It's not that it is terrible, just not worth it to us.
Nine Dragons - Same reason as above. The food is your average Chinese Food available all around here at home and is about 2 1/2 times the cost. Just not worth it to us.
Prime Time Cafe - Call us boring, but I don't want to spend 40 to 100 on a meal and be yelled at by someone serving me. I know it is all in good fun. It just gets old and I like to enjoy myself when I am eating, not be scared to not ask for a certain condiment or worry about my elbows being on the table and being embarassed in the whole dining room. We haven't been there for a while, have no intentions to try it anytime soon. Maybe we are sticks in the mud, oh well.
That is our short list of 'Do Not Go Anymore' Restaurants. It is funny, our list of restaurants that we have enjoyed in the last few years is here on this thread as people's least favorites. Too each his own I guess.