It's erroneous to believe that there's some small group of best dishes or wines in the world, and that what you need to do is find out what those are so you can limit yourself to them for the rest of your life. If you want to get the most out of the world of taste, your default strategy should be to order something different every time you go to a restaurant, and buy a different wine. Statistics prove the truth of this. If you try ten or twelve dishes in a restaurant over a period of time, chances are much better that you'll hit the great ones than if you just order one or two. Besides that, there is pleasure to be had in variety for its own sake.
Every new dish is a new surprise.
Unless you compare every dish to that one favorite of yours. And here's another benefit. The person who shows up at the same time on the same day to order the same thing every week gets much less attention. Pleasure is an accident waiting to happen. Here's the home page for the stuff.