Halo all the way but it's not like I've never tried a COD game. I hear people say that MW (1) was great but I never really played that. I did however buy MW2, which I've heard from many wasnt as good as the MW1, but I actually liked it. I liked the maps and how there was balance between camping and running around. Also a big fan of the nuke. The COD's (not the fish) I've tried since have struck me as much more run n' gun and I don't like that at all. Big fan of R6V (1) too, that was the ideal game for my playstyle.