When you buy a new MacBook Air or Pro, it's convenient (to say the least) to simply import your previous MacBook to the new MacBook, either from the old (outgoing) computer, or from a backup disk. One nice thing about this, of course, is that you transfer any programs you have purchased to your new computer. (For instance, I purchased "TouchDraw" from the Apple store.) Are there any disadvantages to this? Is it better to start completely fresh, and re-create all your Safari bookmarks and your printer/scanner settings and all your other preferences? ..