Meals you like the idea of more than you like eating them
I may be strange, and no one else gets this! But there are meals I sometimes make that sound really good, and while there is nothing at all wrong with them (ie not burnt, or funny tasting), I just enjoy less than I thought I would.
Spagetti and meatballs (in my case, veggie ones). Love the idea of it, sounds good, tastes good, but when I come to eat it it is all a bit 'menh'.
Waffles - the belgian kind, covered in lovely fresh fruit etc. I dream about them sometimes, yet when I got for brunch / breakfast out, I have stopped ordering them, as I find the actual waffle a disappointing eating experience, even if they are very good.