The tending is what kills it for me. Not only having to wait for them to breed for hours if you don't have enough potions, but having to tend to them repeatedly, waiting for hours in between, is what gets tedious. I don't have time to come back every few hours to tend over and over. And the enormous amount of Fire needed to raise an egg is ridiculous. The eggs need tending every 3 hours, up to 6 Fires each, I think, yet I'm only allowed to ask for Fire every 6 hours? And I'm lucky if I get more than 2 or 3 each time I ask. To make matters worse, the Fires don't show up in the Feeds tab so it's extremely difficult to collect enough from others. It takes too much space and fuel to grow the bushels to craft a significant amount. And, as you said, for dragons that aren't breedable or shareable, so it's an awful lot of work for a useless decoration. All this just makes the dragons one big headache. Not the definition of fun.