I've lately seen a lot of people answering questions with identical or extremely similar answers. Why? Yes, some might do it order to increase the Area51 stats, but I do think it's most done to boost the personal stats.
I don't see this as a good thing, instead of having one good answer voted up, two or more answers share the upvotes. And this is not beneficial for this site...
I think adding a new answer should be done if one has another opinion or solution. Otherwise its better to add a comment to an already existing answer, or even edit an existing answer.