I changed all my passwords recently to do the same thing. The problem I've recently started to see is that, let's say for example my hashed+salted password is

I changed all my passwords recently to do the same thing. The problem I've recently started to see is that, let's say for example my hashed+salted password is stolen from a site. If they brute-force figure out what my password is, they'll have my "base word" and all my other accounts may still be able to be compromised. Recently I changed my big accounts (Google, Facebook, StackOverflow) to have a slightly different "base word" and the other accounts that I can afford to lose control of have stayed the same.