a few years back I could only alternate pick...which is a great place to start from, because once you can alt pick, you can do economy picking and such by choice (sweeping is still getting the better of me...but I'm fifally nailing it now).
I find alt picking to be the most valuable technique a lead guitarist can develop, whilst not essential, I would certainly recommend to anyone that they learn how to do it
[FONT=Century Gothic]Hope is when we feel the pain that makes us try again[/FONT]