If you want indented paragraphs, that is either covered by the
babel package (it implements typographical conventions common to the language in use), or you should look for
parindent (paragraph formatting in general) to tweak it.
It is usually a bad idea to do such each time. The advantage of LaTeX is precisely that you can apply document-wide formatting changes by adjusting parameters, local changes don't allow that. Yes, it is often necessary to reuse (part of) the text in a different setting, e.g. the technical report in a paper formatted to the exacting standards of a journal or in a presentation. And when that rolls around with it's normal "by yesterday" deadline, you'll be happy for all the time "wasted" on this.