Transferring Data

Previously, I'd posted a question about transferring my Legacy software from an old computer to my new computer.  Based on the responses I received, I was easily able to load Legacy onto my new computer. 

However now I'm wondering how toget the data from my old computer to my new one.  I'm thinking that I export the data on my old computer (to either a stick drive or an E-mail) and then import it into my new computer (from either a stick drive or an E-mail).

Assuming that is correct, does anyone know which format (PAF or GEDCOM) would transfer the most data, the easiest?  Does it matter?

Thanks in advance,

-Blaise