I joined SETI@home on May 15, 1999, and stayed right up until the last work unit that S@H sent me; i.e., from the very beginning to the very end.
Carl Sagan helped me to see the magic and romance of science, after my early experiences at university almost completely extinguished my interest in it. Indeed, I can trace a direct line between the Cosmos book/series and my (eventual, but now discontinued) dream job of teaching Cosmic Evolution / Big History and Futures Studies. I want to remember him and his immeasurable contribution to science and society via this reflection:
His last wife, Ann Druyan, had her brainwaves recorded for inclusion on the Voyager interstellar record back in the 1970s (before they were married). This is a gold-plated copper record with sounds and music from Earth recorded onto it, attached to the side of each of the two Voyager spacecraft now leaving the solar system. She wrote recently (in the epilogue to Billions and Billions) that during this recording she allowed herself to remember what it was like to fall in love with Carl. This means, therefore, that the Voyager record --- an emissary to the stars from Planet Earth, and one of the most enduring artefacts of the human race --- literally (!) contains a loving memory of Carl Sagan. What could be more poetic, poignant or perfect?