Security.. 

You may not like passwords, but they are pretty much all that stand between you and whatever or whoever wants to see what you have stored in your computer. Let's look at some common scenarios.

Email:

When you open your email, do you have it set so that you do not have to enter a password? You may not have anyting important in it, but how would the people in your contacts list feel if they knew that anybody could see their email ID's and whatever other info that you keep on them, a home address and phone number for instance?

The situation gets even worse if you don't have a password at the Windows login stage

Stolen!!

It happens, especially laptops, nice and light, easy to conceal, easy to sell on. So now, somebody you don't know has obtained your computer, and there is no password set to get into it and no password on your email either. It is sombody's birthday, but you will not be celebrating. Before the 'new' owner sells it on, he/she can have a good look through everything, run password finders, search your email for money transfer information, look for documents which may contain stuff of interest.

Having secured all that they want, a quick re-install of the operating system which leaves no trace of the official owner, and its good for $200 maybe.

Hi-jacking:

This is the 'virtual' equivalent of your computer being stolen from your house or vehicle, but it is 'virtual' in that the computer doesn't leave your desk. It gets taken over by persons unknown, and these people can run exactly the same stuff as if it had been removed. This activity can be stopped by ensuring that you have no malware installed. I run Malwarebytes every now and again, just as a quick check. See the software section > links to FREE software.

So, back to passwords:

Its not enough just to password stuff. The passwords have to be good and that means that the password should NOT be a real name or a word that you can find in the dictionary of the same language as your operating system. The reason? This is how password finders work. They use dictionary databases to check every word and variation found in 'English' for instance. 

If you want a good password, take a look here..

http://www.microsoft.com/security/online-privacy/passwords-create.aspx