I agree with svenz - unaspected planets become powerful because the person feels that the things the planet represents are not properly integrated.
With Sagittarius on the 4th, Neptune in the 4th, Jupiter conj. Asc, and Chiron in the 9th, a very clear picture emerges of a person who is searching to connect with something larger than themselves. On one level this will be acted out through travel or moving to foreign countries, seeking wider horizons, new perspectives and experiences, maybe even through higher education. On another level, it will be acted out in a search for a life philosophy and some greater meaning to enrich their lives. They feel as if their life has been lacking a sense of expansion or growth, so they feel driven to seek this. Religion or spirituality might also play a big part in their lives. But with Jupiter in Virgo, it is likely that many of the opportunities to extend themselves by seeing new places, new cities, or new countries or expanding other areas of their life will come through their work.
Also, Neptune in the 4th can lead to many changes of home, all the more so with Sag on the 4th because both of these are ungrounded. Neptune in the 4th can have high expectations for how their home, country, city, should be like, and expect this to somehow nourish their quest for inner satisfaction and a strong sense of self, especially with Neptune opp. Sun. But this can result in a long search for the "right" place, even if it is simply moving around within the same city.
By the way, this chart has a LOT of aspects. A very complex person!