I have a similar concentration of planets in my natal chart--Sun, Moon, Mercury, and Venus in my first house in Aries. According to my birth certificate, I have an Aries Ascendant, as well.
Don't concern yourself with how "rare" any configuration is, because "rare" does not mean "better" or "more special." We are each born at that moment when the planets are in exact alignment with our personal karma.
As for the Sun and the Moon occupying the same sign, this means that you were born during the Balsamic Moon phase (if the Moon is behind the Sun) or the New Moon phase (if the Moon is ahead of the Sun). This difference is very important, for two individuals with the same Sun/Moon sign may manifest this energy differently if they were born during different Moon phases.
All those planets are
saturn, the planets mixing up each other also changes the interpretation.
I agree with this statement entirely. Although I possess many typical Aries traits, I manifest them differently than individuals whose stelliums are not afflicted by difficult Saturn/Neptune aspects.
About three percentage of population has this combination. A lot depends on order of planets, level of combustion, New Moon, Solar Eclipse, Casimi, etc.
This is also a very good point, for I have read that the planet that's furthest ahead in a stellium is the "guide" planet, exerting more influence over the others. I wish I could find the link.
How far apart are these planets in your natal chart? Again, I imagine this makes a difference. There is some controversy about the "desirability," for lack of a better term, of combust planets. Many astrologers say it is better to have Mercury, for example, farther away from the Sun because this allows the native to have greater distance from his thoughts; thus, he is more receptive to the ideas of others. However, if the two planets are within orb of a conjunction, I think it is better if they are extremely close than somewhat far away because there's more distortion. Think of playing two notes on a piano, separated by a half-step or a whole-step. There's much dissonance there, and the sound is not pleasant, but when the notes become close enough to become one tone, it is pleasant.
So there are a lot of factors to cosider.
Arian Maverick