Cloning myself for the purpose of dividing up the work some more might backfire - what if my clones also would rather daydream rather than do the work, then look at me and ask me to do it? Oh man, that'd be so horrible but so me.

That said, the idea of cloning a wife or sibling does repel me, a person is more than their DNA, their experience also makes up who they are and as cloning technology is mostly at the embryo stage, they are not replicating the memories or knowledge or skills that also define a person as who they are. And even if technology was at that point, the fundamental idea of a self for a person - the original person's "self" is who I want, not a cloned copy.

There is a lot of utility in cloning, but applications of it to humans certainly feel odd - perhaps they'll be treated as late-coming twins to the "original copy" and then be free to live life as they wish, and I suppose that's okay. But if there reaches a point where one person can be cloned dozens or hundreds of times, and furthermore be further "modified" to always act in some way or another, well, it'd be nice if they didn't serve as relentless soldiers for some government or another.

Cloning animals or pets can help greatly with research, as helps with controlling the animal's very own DNA, but genetic diversity within a species through reproduction is still important - there may well be a disease waiting out there that specializes in taking down that clone's particular strain of DNA.