You can't even remember 1?
FAIL
Same everywhere is not that good either. If your pass gets leaked/hacked or what ever it will most likely end up in a crackers combo file and then it might not matter if you have a diffrent username. I guess it would be best to make a new username and pass on every site but thats pushing it a bit to far
Bookmark and save passwords on FF.. Really sucks when they disappear for ya though, I feel you man!
Bookmarks