what 3 bags from LV do you think every girl needs in her arsenal!

I don't think every woman will have the same needs in bags but I know for me it's:

Delightful MM - everyday bag, comfy

Pochette - nights out or quick grab & go (any print)

Speedy or Alma - handheld bag that you can dress up depending on print/occasion
 
Whichever three you can get! Kidding, but only kind of...they are all nice for the most part. Like most have said a handheld classic such as a Speedy 30 or 35, a tote such as a Neverfull and then it gets tricky...... Either a nice shoulder bag with a zipper like a Palermo or you may want to start with your smaller items like the pouchettes or an Eva......actually I need an Eva