Battlefield 3 or Guild Wars 2?

Guild Wars 2 is not due to come out for moths yet, so you have plenty of time. Don't stress yourself over it right now. You can definitely play BF3 for a bit if you're into that sort of thing and then pick up GW2 when it comes out, which is hopefully around the turn of 2012. Beta is looking likely this year, for those who are hardcore about joining in first. :)