Not to me!

I keep a spreadsheet with a list of about 20 websites that have my credit card info on file. To change credit cards, I have to go to each and every one of those sites to update the data, and trust me when I say that at some of those sites that is not an intuitive process!

Like Dignan, I use LastPass and do NOT have any passwords that are used in more than one place. My passwords are all in the format of 1Xq&M8g4q#E^ and are passably secure, although I remember reading an XKCD comic once that pointed out that if, hypothetically speaking, I had an account at, oh, say, the Daisy Hill Puppy Farm, a password like "My Beagle likes to grow flowers" would be both mnemonic and more difficult to crack by brute force than something like 1Xq&M8g4q#E^.

My LastPass master password is 24 characters long, contains upper and lower case, numbers, and special characters, yet is mnemonic enough that I can type it without reference to anything else.

tanstaafl.