Check these, please!

[Anonymous]

Hi,
Please check these sentences and correct them.
1. On his leaving home, it started raining.
2. How many books does he have? / [About two hundred.] or [About two hundreds.]
3. When painting, there are many different substances we can use: ink is one, paint is another, charcoal is a third, and [etc, so forth, so on].
4. She seems like a straight person. [What does 'a straight person' mean?]
5. When I was a boy, catching crabs in the seaside/seashore was my favourite pastime.
6. Most people find the [actor, movie star, TV talent, entertainer] obnoxious and abrasive.
7. He was outstanding/distinguished/proved in the competition.
8. (Compared) To them, John is a dream. Handsome, rich, honest, polite, and able/competent!
9. (It's like) The more I give (you), the more you want
10. It's like we're trying to put a Band-Aid on something that's just been bled dry. It's finished. / It isn't finished if we give it a chance.
Thanks in advance.

[Rusty]

1. On his leaving home, it started raining. (OK).
2. How many books does he have? / [About two hundred.] or [About two <strike>hundreds.</strike>]
3. When painting, there are many different substances we can use: ink is one, paint is another, charcoal is a third, etc. [and so forth/ so on]. (And is not necessary before etc.)
4. She seems like a straight person. [What does 'a straight person' mean?]
(When referring to a person, straight usually has two meanings: 1) honest, fair, candid. 2) heterosexual).
5. When I was a boy, catching crabs at the seaside/on the seashore was my favourite pastime.
6. Most people find the [actor, movie star, TV talent, entertainer] obnoxious and abrasive. (OK).
7. He was outstanding/distinguished/proved in the competition. (OK).
8. (Compared) To them, John is a dream. Handsome, rich, honest, polite, and able/competent! (The meaning of the sentence changes when you include "compared". "Compared to them..." you are comparing John to somebody else. "To them..." you are saying that somebody (them) thinks John is a dream).
9. (It's like) The more I give (you), the more you want. (OK).
10. It's like we're trying to put a Band-Aid on something that's just been bled dry. It's finished. / It isn't finished if we give it a chance. (OK).