So, here is the table of every planet's Exalted signs, Mool Trikona signs, Own signs and Debilitated signs. If we go by quantum of results, then planet gives best results in exalted signs and in decreasing order after that and the least results in debilitated signs. Again, debilitated doesn't mean that person won't have any good moments in life. Whole chart remains important and if there is some planet debilitated then there will be some planet in good positions which will make life worth living and enjoying.
Again, there are some friendly, neutral and enemy signs also, which means if a planet is placed in a sign ruled by its friend planet then it is in friendly sign. For Ex - Sun is placed in Scorpio. Scorpio is ruled by Mars. Mars is Sun's friend, So, Sun is placed in friendly sign. Earlier table of friends and enemy planets will be useful in understanding this concept.
Again, if Sun is in Capricorn, it is in enemy sign as Capricorn is ruled by Saturn and Saturn is Sun's enemy.
Suppose, Sun is in Gemini or Virgo. Gemini/Virgo both are ruled/owned by Mercury. Mercury is neutral to Sun, neither friends nor enemies. So, these two are Sun's neutral signs.
Again, Rahu and Ketu are in all signs as guests. They are neither exalted nor debilitated, but due to the mythological story I posted before, they consider Sun and Moon as their enemies. That's why, Leo (owned by Sun) and Cancer (owned by Moon) is considered as enemy signs of Rahu and Ketu.
Hope this helps. Thanks,