Virgo generally a difficult Ascendant:
Virgo, as the sixth sign, has the negative indications of sixth house, the tendency toward disease and enmity. It is one the most materialistic types of Ascendant.
Libra Ascendant generally strong and successful:
Libra is often considered to be the best Ascendant because main negative planet Jupiter, whose great benefic nature often makes it function in a positive way. Saturn, ruling houses 4 and 5, becomes the Raja Yoga planet, a great benefic. Libra is a cardinal sign, which gives strength and capacity to affect the world.
Taurus and Scorpio Ascendants prone to self-created diseases:
If Ascendant has planets ruling houses of diseases 6 or 8 along with other malefic houses (3, 6, 11, 12), then such planets become powerful disease significators for such Ascendant. Jupiter becomes such disease significator for Taurus Ascendant and Mercury for Scorpio.
Mars- a difficult planet for Gemini Ascendant:
Houses 3, 6 and 11 indicate egoism and excess use of force, along with a tendency towards a manipulative, aggressive nature and ulterior motives. When planet rules these houses it can make an individual overly impulsive and self-promoting to the point of blindness or violence. Mars is such planet for Gemini Ascendant.
Jupiter gives wealth for an Aquarius Ascendant:
When planet rules over houses of Artha (wealth) it gets status of significator of wealth. The strongest case, when planet rules over houses 2 and 11 as in case of Jupiter for Aquarius Ascendant. It is even more auspicious in this case because Jupiter itself is a natural significator of expansion and abundance.
The Moon often inauspicious for Sagittarius Ascendant:
Moon is a ruler of 8 house of disease for Sagittarius Ascendant. Moon in this case may indicate unhappiness, problems and even diseases (moodiness, depression and negativity) in emotional level of mind (manas), which Moon naturally represents. On physical level it may indicate problems with body fluids, representation of Moons energy on this level of manifestation. Likewise it may indicate chronic disease and short lifespan of natives mother.
Leo Ascendant often have difficulties in relationship, or differences of age or status with the partner:
Saturn as a ruler of houses 6 and 7 for Leo Ascendant is a planet of enmity as well as relationship. It gives tendency to subordinate their partners or choose one lower in status or with great difference in age.