I did go with Chrom X Sumia, but that was more because it was the pairing the game
clearly wants the player to go with. I didn't even know about dark fliers until they showed up as enemy units, and therefore I didn't know about Gale Force. Hell, I didn't know about
inheritance.
Though I did notice that the party members' future kids have their dad's hair color... with the apparent (I never did the respective paralogue for some reason) exception of Morgan, if the MC is a dude.
You may have guessed that I didn't look at any forums or anything until
after beating the game.
Also, is it just me, or is Awakening a lot like Genealogy of the Holy War?