The only way I would want to be immortal was if I could make real my fantasies about uploading my consciousness into a computer, living vicariously through meat-puppet bodies. I would also produce children to raise and give them the option of joining the collective (using genetic samples, and they would come in all colors and kinds). It would be an entire civilization. The fantasy is very involved, I've had years to work on it. We'd colonize an alternate universe with stars but no life, and build dyson spheres around a bunch of the stars. I'd even offer my friends the opportunity to join the collective, or - barring that - to have an immortal body and live with the collective without being linked mentally to them. But with all the people in that new civilization, I'd get over the deaths of those who didn't want to join up. After all, with the technology we'd have at our disposal, pretty much anything is possible, and we'd have a whole lot of exploring to do, what with the internal liveable surface area of the dyson spheres being at least several million square kilometers. And along with Earthlike biospheres, there would be a wide range of others, like a Traipahni biosphere, a biosphere with dinosaurs, and a whole bunch of others.