If you have the expertise or a passion or interest for a subject, you're ready to start making money with a blog. With a service like Blogger (www.blogger.com), you can start up your blog totally free. You can also create your own site and secure your own hosting for a low price, which is generally the route I recommend, as many free blogging sites have restrictions on what you can say or do, including making money or advertising.
If you love leaving customer reviews on sites like Amazon, it may be beneficial to look into affiliate marketing as a source of income. Word-of-mouth advertising is still a huge lead generator for many companies, and a lot of businesses are willing to share a portion of their profits with persuasive individuals who will promote their products to the public.
In the long-term, it affects your versatility, functionality, and, of course, your brand. In the short term, it can certainly add/take away a lot of headaches. That said, just like choosing a physical house or office, there is no such thing as an absolute “best” or “top” choice. There’s only the right choice relative to your goals, experience, and circumstances.