lol, I guess... My facebook password is a mash of 12 letters and 9 numbers
Then already you are doing more than I and many others would be able to remember.
Why do you think many people use 'letmein' and 'password1234'? Because they struggle to remember passwords...
Just people who like to use a different unremenberable passwords for each site...
Some people think that is more secure than other methods and are too paranoid to leave themselves logged in.
If you just want to log in easier all modrn browsers can remember passwords.
I guess if you don't password your laptop...But then if someone nicks your laptop, they also nick your passwords. I wouldn't call guarding against that as paranoia.
Plus if someone somehow manages to find out your master lastpass account password, they still cant access your lastpass account if you have Google Authenticator configured, unless they pinch your phone as well. They'll also need to know the unlock password/code/patern to access your mobile too.
I guess if you don't password your laptop...
But again, most people who steal laptops or buy stolen laptops are not interested in messing about to get access to your facebook or posting on how gay you are on OCUK.
I guess if you don't password your laptop...
The idea though, is that each site you register for has a unique password, normally gobbledegook that you wouldn't usually remember. You'll be able to remember a handful, but upwards of that and you'll struggle.
The likes of LastPass fills out these usernames and passwords automatically, so you don't need to remember them.
Personally, I use the free KeePass, which fills in details automatically on desktop Firefox and Chrome, but not on mobile (though you can copy the details to the clipboard).