I dug up a long list of Astro-questions that are indexed from old newsletters:
For your curiousities....
All of these questions are addressed by Kid Astro in his specific section:
Do Full Moons really make things ‘happen’? http://www.starself.com/newsletter3.html
What are Astrological ‘Houses’? http://www.starself.com/newsletter4.html
What do the “four elements” mean? http://www.starself.com/newsletter5.html
How do we know what Sun-signs are ‘best for us’? http://www.starself.com/newsletter6.html
I was born on the cusp. Which sign am I? http://www.starself.com/newsletter7.html
What significance does it have if someone is born “C-section”? http://www.starself.com/newsletter8.html
When I read about my Sun-sign, it doesn’t sound like me? http://www.starself.com/newsletter9.html
How can I learn to use astrology to help me in my life? http://www.starself.com/newsletter10.html
Since I have free will, how can Astrology still “work?” http://www.starself.com/newsletter11.html
What about sayings like: “What got into you? http://www.starself.com/newsletter12.html
What is going to happen during my Saturn return? http://www.starself.com/newsletter13.html
Why is the moon so important in a chart? http://www.starself.com/newsletter14.html
How can I use astrology for career guidance? http://www.starself.com/newsletter15.html
Why should you believe in astrology? http://www.starself.com/newsletter16.html
Why are twins so different from each other? http://www.starself.com/newsletter17.html
What of generational planets? http://www.starself.com/newsletter18.html
Why are signs considered “masculine” or “feminine”? http://www.starself.com/newsletter19.html
What is a progression or a progressed chart? http://www.starself.com/newsletter20.html
What is a ruling planet? http://www.starself.com/newsletter21.html
What does Cardinal, Fixed, and Mutable mean? http://www.starself.com/newsletter22.html
Are we in the 'Age of Aquarius', or what? http://www.starself.com/newsletter23.html
Why does Mars make us irritable? http://www.starself.com/newsletter24.html
What is an 'afflicted' planet? http://www.starself.com/newsletter25.html
How are two charts compared to each other? http://www.starself.com/newsletter26.html
Does astrology work for pets too? http://www.starself.com/newsletter27.html
Is that really Kid Astro? http://www.starself.com/newsletter28.html
Can transiting Saturn and Neptune really make you tired? http://www.starself.com/newsletter29.html
Why are Sagittarians so lucky? http://www.starself.com/newsletter30.html
What happens to a planet when it goes retrograde? http://www.starself.com/newsletter31.html
What are the "benefics" and "malefics?" http://www.starself.com/newsletter32.html
What is a "midpoint?" http://www.starself.com/newsletter33.html
What is an "anaretic degree?" http://www.starself.com/newsletter34.html
Why are people often afraid of Scorpios? http://www.starself.com/newsletter35.html
no 36
Does Pluto in Capricorn signify the "end times?" http://www.starself.com/newsletter37.html
Should people read their daily horoscopes? http://www.starself.com/newsletter38.html
Just why is it so difficult to do astrology? http://www.starself.com/newsletter39.html
What do you think Jesus’ birth chart looked like? http:://www.starself.com/newsletter40.html
In general, what is the most difficult Sun sign to be? http://www.starself.com/newsletter41.html
What would your birth chart look like if you were born way out in space on the space shuttle?
http://www.starself.com/newsletter42.html
Of all the professional prognosticators, why are only astrologers ostracized?http://www.starself.com/newsletter43.html
Is it possible to do something that is essentially ‘unnatural’? http://www.starself.com/newsletter44.html
http://www.starself.com/newsletter44.html
Why are Scorpios usually so intense? http://www.starself.com/newsletter45.html
= new reply since forum marked as read
SO much to explore!
Thank you for so many interesting questions to read. 
BTW, I think that the reason twins are so different is because they are different souls inhabiting the same (identical) or similar (fraternal) bodies and sharing an almost identical astrology. There have been cases of twins born on different days (before and after midnight). Only conjoined twins are born at the exact same time.
I was also surprised and pleased to not see Aquarius on the list of most difficult signs.
to me if twins are actually born on different "calendar days.
I like your idea about dual souls, makes much sense. But, twins in actuality really do behave quite differently
and have varied experiences to me. I have no idea why and only continue to guess.
My list of most "difficult" signs is just my limited experience. Astrology is very complex; don't you agree? 