I read an interesting arcticle about different levels of password the other day - how it was healthy to have a low grade password for all the non special sites (ie those without any crucial info or credit card stuff etc.. - like UKB) and reserve your more complex password(s) for the sites that needed to be secure (banking etc..).. Along the lines of using the more complex one for everything made you effectively more vulnerable - as if they cracked that one they had everything etc...