I haven’t delved into making assets for current engines; but I do remember the discussion of modeling in quads and triangulating the model inside the modeler, rather than leaving it up to the game engine. Most of the time it works out fine; but there are occassions where the game engine gets it wrong, and errors occur. Of course things may have improved since then, and the above may be a mute point now. I was also always told to stay away from N-Gons and model only in Quads. Again, could be wrong.
