Hello everyone! After long time and many troubles, I've decided to buy a new MacBook Pro. I'm currently writing from an old 13" MBP Core2Duo from 2009, which contain, as you may imagine, seven years of works, files, applications, and crap. I would like to have a fresh machine to work on, and I think that all the old applications I have installed/uninstalled, so all the old permissions and system files could make my new Mac immediately "dirty". But of course, I don't want to lose the current applications I have, so as all my internet passwords (which by the way should be on Keychain, right?). I know there is Migration Assistant, and I've already used it once, but I don't remember what kind of informations it allows me to migrate, and I don't know what is better to migrate and what not. Hence, the the title of the thread. For completeness of information, from 2009 to today I've only been through Snow Leopard (10.6) and Mavericks (10.9), which is my current OS. Thanks in advance!