Reploids may not need to eat or sleep, but their existence isn't economically free at all, as MMZ tells us...
There are only so many kinds of labor that relate to energy resources.
Your family as it is would still exist and of course you could still form bonds with new people, so it's not like society would become a sea of lone individuals. People would still care for each other, though things like marriage might become sort of nebulous; I could imagine both parts agreeing to see what life is like with other significant others.
Defeats the point of marriage, I'd say.
"As it is" is the whole problem. Families are supposed to shift over time. You gravitate away from the people who raised you, and your ability to do so is a testament to how successful they were (or what a great self-tutor you are, if they sucked at it). The immature grow self-sufficient until they feel comfortable taking care of others, at which point they establish a new branch. If you enforce sterility, those who grow up find that they are not needed. The family unit hits an impass and only those who find fulfillment in work can adjust.
The core problem, both in family and labor, of "immortality + sterilization", is that the world effectively stagnates.
Plus there are other things in life than working for money that people enjoy, like art and sciences of all sorts, so I doubt all that will be left for people to do is be selfish when they have little want of anything.
You're still working for people, though, just not in the material sense. The arts exist either to inspire others or to express and satisfy yourself. But not everyone is creative, and not everyone who is feels that they can make a big enough impact that it's worthwhile.
I don't think that last would really happen; the universe is vast, our time in it short and our senses too narrow to get to appreciate all of it even if we live until the end of everything. And of course we're not going to FORCE people to stay alive; we're just not going to force them to age and die, either.
Irrelevant. Except in cases of extreme suffering, life is not something that is ended by choice.
Not played it, unfortunately.
You are dead to me, and can get started on your resurrection by watching this:
Even so, you'd best get your soulless husk into some PS1 action. NOW.
Basically, perfection itself was the problem. There was no death, no hunger, no disease. And after about three millennia or so of no hardship, there was no appreciation. Those on top followed their whims, those on the bottom had their duty. That was all there was to life. The Master decided they'd lost too much in that shift.