This article on the People’s Pharmacy website does a nice job of outlining the history of daily aspirin and of reviewing its pros and cons. As the article points out, the increased risk of bleeding seen with daily aspirin only turns out to effect very few individuals, so the risk, while real, is not very great. The benefits, on the other hand are a reduction in risk of cardiovascular events and of colon cancer.
Currently, the US Preventive Services Task Force recommends that only persons at increased risk for heart disease take aspirin daily. Personally, although I wouldn’t be considered in the “high risk” category, I have opted to take it, as I believe that the benefits outweigh the risks.
I encourage you to read the article and make a similar decision about whether this a good plan for you.