sweet dude!!!
I'm thinking of playing ranked until I level up and unlock everything then hit up unranked for some different fun....though I do think you can unlock all the guns with unranked anyway so thats cool. I'm picking it up at midnight, so whenever STEAM decides to unlock it I will be playing
I think most people will be playing ranked at first because people in general like to look at their stats online and see who has the biggest epeen. After a little while, I think unranked will take over. But do whatever you want man, I'll play in it whatever it is.