How does it work, this etiquette on Twitter?

How long do I have to follow you before I tweet you?

Should I expect a reply if and when I do?

When I don’t get a reply, what do I do, what do I do?

When I do get a reply, should I tweet right back at you?

How many tweets/re-tweets does it take to be part of an ‘inner crew’? 

To #hashtag or not, is it just a quirk?

This ‘Twitiquette’, on Twitter, how does it really work???