I'm the only one who could pass on my family name. I was told it often times when I was a kid. My father was the only brother from five, and his father was the only one who survived WW2, and that's just because he wasn't good enough to be taken to the front...
My sister is questionable to have kids ever, she is too old by now and diagnosed with bipolar (and is said to have no sense of responsibility by some). I have cousins who have plenty of children altogether, so the genes will undoubtedly stay in circulation for a long time.
My genes, hmm, aren't among the best, though. My maternal grandfather had some kind of mental illness (I've never met him), and my parents are a tad eccentric, to say the least. However, I'm very determined to have kids, and I admit that it is a selfish thing. I don't mind the difficulties that it will surely impose on my life (and I hope the descendants would understand the same goes to theirs). I trust the pleasure that would stem from the fulfillment of my most craved dream would be so overwhelming that it would surpass the frustration of the inevitable obstacles and difficulties. Naivity...
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Another non-English speaking - DX'd at age 38
"Aut viam inveniam aut faciam." (Hannibal) - Latin for "I'll either find a way or make one."