Opinion: What the Call of Duty series does right

While Halo was the greatest shooting game to grace the previous generation of consoles, Call of Duty is the mark of the newest consoles on the market. The Call of Duty series has exploded in popularity, yet it doesn't seem to generate as much hate as the Halo series. I find that on almost any internet forum, there will be many, many people claiming that the series is 'overrated'. Yet there are