Well, the zeus thing, is actually quite an interesting topic. Even Ares, somewhat a god in name only, which was more described as a "demon of war and conflict", and only truly paid homage to in sparta - with a statue bound in chains - was perceived to have become that way because of his father. Or, well, more because hera's influence over him, and their shared hatred of zeus' unfaithful ways.
[Quoted from Illiad, Zeus speaking to Ares:
"To me you are the most hateful of all the gods who hold Olympus.
Forever quarrelling is dear to your heart, wars and battles.
Truly the anger of Hera your mother is grown out of all hand nor gives ground; and try as I may I am broken by her arguments, and it is by her impulse, I think, you are suffering all this.
And yet I will not long endure to see you in pain, since you are my child, and it was to me that your mother bore you. But were you born of some other god and proved so ruinous long since you would have been dropped beneath the gods of the bright sky."]
The vengeful estranged / divorced mother, pulling the child to her own side, setting it up against the father. While a common story in todays society, it seemingly already existed as a theme ~2500 to 3000? years ago. Truly, man never changes. A big part of the appeal of greek myth, is that their gods are still so very human, and not held to a divine standard.
Still, they are not any less divine in their might - safe for comparison towards monotheistic religions. Guess they aren't "the classics" for no reason, eh?
Disregarding that particular topic; Even if we would shag with a goblin, a race with a maximum lifespan of give or take 40 years, our child would be quite more of our own blood, than that of the inferior species. The resulting child, wouldn't grow out of adolescence for at least 200 years. Even with the slowed draconic developement, that is ample time to shape our offspring.
On the other hand, any child of ours, half-breed or not, would be more of a long-term investment, than a quick boost to power. Granted, they would also have power befitting of such an investment. Any child of ours, could only be matched by a being of power, dependant on its other parent, at least a hundred elite warriors of a long-lived race, in a blunt power show-down at that. (Yes, guerillia tactics work great for all levels of power. Or rather, they work even better, the more power you are able to deliver with a "few punches" before your retreat.)
While the first decade will play out year by year, the second most likely 2 years at a time, I doubt we will "skip over" more than 5, or ten years at a single turn, even in the "endgame". Thats quite the number of turns. Even if I built the game mechanics with the plan of "being easy to maintain and update", any offspring of ours would need at the very minimum ~a month or two to grow up.
Eh? The update? Yeeah, well. The set-up, has turned out to be a bit more than I intially thought. Like always, and still falling for it even when trying to account for it. Shame on me and my project-planning, I guess. Oh, and then there's the weekend, and my second evening of getting "rather" drunk. In conclusion; Le~t's just postpone "the most work I am likely to do on a single turn for this game", a day or two longer, than I first planned. Right. So much for my excuses, I guess?