I'm not too sure what I'd do....I'd like to have a biological connection to at least 1 child in a long term relationship. I'd like to use one of my eggs with my gf/wife if I had one. I wouldn't mind even being pregnant myself for my girl if she wanted to have children together and she couldn't carry. Maybe 1 from me, 1 from her eggs? But I wouldn't feel comfortable leaving the house pregnant if I was on T with facial hair and stuff. Way to out myself all over the place. So idk there. Haven't come to that bridge yet.
I like the idea of adopting, but yeah...expensive and lengthy process.
And I agree that sperm doesn't make a father, love does. I have referred to my biological father as a "sperm donor" a lot in the last few years. He had nothing to do with my brother and myself. He only raised his other child. I had never even talked to him. Then he died just about 2 years ago.
So, in short...there's options, its all just a matter of comfort.