Pluto is the final generational planet. It spends so long in a sign that it affects everyone born within a twenty-one-year period near the time of your birth. All by itself, it is not the most important feature of your chart, since such a huge number of people share this placement.
However, it does describe some general conditions that were activated during that period, and to a certain extent, you and those of your generation carry that energy forward with you as you mature and develop. Pluto is all about power, and the Pluto sign of those in power shows how they will wield this important responsibility. Your generation (those born between 1939 and 1956) now holds the reins of power in government. Often considered the 'me' generation, these were the first folks who left home and family to 'find themselves.' Now moving into senior-citizen-hood, all that self-care is finally paying off in longer, healthier later years.