Different audiences require you to use different styles.
Some audiences require more explanation of basic concepts than others.
A hostile audience will require more evidence and logic than an audience which is already on your side. An informal audience would call more for anecdotal evidence and personal color. Be sure you match the type of style you use to the intended audience of the paper. If you're not sure what that style is, check with your instructor. Reading some of the literature in a given field will also give you an idea of the style which is typical for that type of material.