Why should you examine your writing style with the idea of improving it? Do so as a mark of respect for your readers, whatever you're writing. If you scribble your thoughts any which way, your readers will surely feel that you care nothing about them. They will mark you down as an egomaniac or a chowderhead --- or, worse, they will stop reading you.
How to write with style
Kurt Vonnegut wrote a lovely essay on style. Why should you read it? I'll let him answer: