I happen to be crazy in the sense that I actually like airplane food. There is something about the experience of unwrapping a kosher meal and tearing plastic wrap with your teeth that really makes the food delicious IMO.
I almost never BYOK and am happy with most KSML offerings. I once booked a flight with two stopovers, 10 hours before departure. Since I didn't think we would have KSML's on any of the flights, I brought my own meals. The first flight we eat the stuff we brought but the next two flights actually had KSML's so we ate that instead of the fresh, restaurant prepared food that we brought with us.
In any case some stuff is so vile that even I can't eat a single bite.
The worst meal we ever got was flying MLE-IST on TK. The outbound flight KSML was actually very good, especially the cheese plate that had 3 or 4 different cheeses that were delicious. The return leg was a shelf stored Stogol meal that doesn't need to be refrigerated and has a six month shelf life. I don't know what they put in there that makes it last so long without a freezer but whatever it is must be nuclear. In any case I got a salmon meal and upon opening the thing, a disgusting rancid, rotten smell filled the entire business class cabin. I actually took one bite after which I literally grabbed the arm of the nearest steward and asked him to throw out the meal immediately.
My best experience was on a three hour flight from SIN-HAN on SQ. Despite it being such a short flight, they offered both my wife and I a choice of either a fish meal or a vegetarian meal. I asked for both and they readily obliged. The meal started out with a huge entree course that would have counted for a meal in itself since it included a good sized portion of pickled salmon which was excellent. Both the Fish main and the vegetarian meal were delicious and well sized and for the first time on a plane I was stuffed to the point that I couldn't finish my meal.
Someone claimed earlier in this thread that no one will pick an airline because of their KSML quality. That is not exact. People do choose an airline due to their overall product quality and the meal is a big part of the soft product.