This is a weak thesis because it merely states an observation. Second, the phrase negative and positive aspects is vague. A well-crafted thesis statement reflects well-crafted ideas.
This broad thesis statement runs the risk of allowing you to go off on several tangents. The first style uses a list of two or more points. Generally, your thesis statement can be the last line of the first paragraph in your research paper or essay.
For example, if you're writing a seven-to-ten page paper on hunger, you might say: World hunger has many causes and effects.
Otherwise… why would your point matter?