I was about to take the next step in my bible study, and "ride along" in field service, so I will answer with my experience. We were almost at the end of the "Bible Teach" book, when I began to become interested in observing the preaching work. I was a slow study.
They use the verse Matthew 24:14 (the good news will be preached to every corner of the earth, and then the end will come) most frequently, when asked why they preach door-to-door. I was recently referred to 2 Timothy 4:2-4 (keep working, even through tough times), and James 2:14 (faith without works is dead).
To become a member, you have to pass an 80 question exam, that qualifies you for baptism. Once you are baptized, you are considered a member of the Jehovah's Witness Organization, and then you are subject to their rules. They are very strict, and you are expected to follow every guideline. Worldly associations are discouraged. "Bad associations spoil good habits." Hobbies and worldly pursuits, such as sports and travel are also frowned upon. Members are expected to spend every Saturday morning, Sunday afternoon and any other free time they have from their jobs, out in the field service ministry. You record every hour in service, and every piece of literature you "place." These time sheets are turned in each month. They are required, from my understanding. The more efforts you can prove with your score card, the more "privileges" you get in the congregation. You can move up to higher positions, based on your service and popularity. Elders have power as "shepherds" over the congregation. There are overseers over them, at different levels.
The entire organization (they claim to have over 7 million members) is under the leadership of the "Faithful and Discreet Slave," also known as the Governing Body. The GB consists of 8 men at the Watchtower Society headquarters. They make all the rules, and change their doctrines when they realize they made some error in the past. All communication comes down from the Watchtower, through the chain of command, until it is announced to the congregation, where all members are expected to accept and obey everything they are told.
The "skits" are performed at big circuit assemblies, and are the highlight of the event. They are the only part of the assembly that is remotely entertaining, and they contain "real life" scenarios that JW's face. They attempt to help them deal with the world, as they follow the guidance of the "Slave." They are usually adults.
I know a JW who has a beard, but I don't think he has any privileges in his congregation. We never heard about the beard rule, but know many JW men who have mustaches. The women dress in a very worldly fashion, with spike heels, short skirts and flashy jewelry. Lots of makeup, expensive shoes and hairstyles.
You can attend meetings, and you will not be held to the same standard as a baptized member. Their primary goal is to get you baptized into the organization, so they can help you control your life. They will love-bomb you and make you think you have a loving family at the Kingdom Hall.
As soon as you ask too many questions about the organization itself, they will start to panic. Our experience might be different, but the questions we raised were never addressed. They were always put off for "another time." When we asked direct questions that were not in the "teach" book, they were dodged and avoided. JW's are skilled at changing the subject and diverting your attention to a topic they like to talk about.
Our bible study and meeting attendance finally ceased, when the elder who was teaching us, asked my husband, "Are you going to make some progress here? You are sentencing your entire family to death at Armageddon." Death threats? Really? At that point, we decided it was time to stop lying to our "friends."
Funny thing... those people who "loved" us so much? The "friends" we made at the Kingdom Hall meetings we attended for close to 2 years? They never came around, after we stopped going to meetings. Conditional love is what you will get, and from what I hear, it does not get better after they convince you to get baptized. They have the strangest brand of "love" I've ever encourntered.
Anyway, I'm sure someone will correct some of my statements. I was never a JW, so I only know what they told me. They are actually trained to lie to people who don't deserve to hear the facts.