- Whatever "aspects" their Sun makes to any of their other 9 planets, and
- Whatever "aspects" their Moon makes to any of the other 9 panets, and
- What the OTHER 40-50 factors are in their personal natal chart, and
- How much they have changed and grown as a person, since they were born (since astrology is just one of the influences on us, acquired at the moment we were born) ....
This COULD be a WONDERFUL influence on the person. Full of intense protective and nurturing instincts, and enough depth of insight and self-mastery to control themselves and not be selfish.
Even with harsh aspects to their Sun and Moon from any of the other planets, this person has the POTENTIAL to realize the best part of their nature (as outlined above). And you cannot tell, by looking at their natal chart, how much they may have achieved this to date.
Your comment on being "all water": that would mean that ALL 10 of your planets are in Water signs, and that both your Midheaven and Ascendant are in Water too. And that Air, Fire, and Earth Signs had NOTHING in them in your natal chart.
In over 45 years of doing astrology (including 40 years of meeting with astrological clients), I have NEVER seen a chart where more than one Element was totally empty of planets. And even THAT (having one Element with NO planets in it) is highly unusual.