Civilization IV makes my life complete for a lot of reasons. First of all, I will always have something to do when i have nothing to do (or am supposed to be working). For me without Civilization IV, I would die. When I come home from work, I play civ. You see, I am a nice guy, when I'm mad at my boss I don't punch him in the face. I go home and open up civ and nuke every city on the planet. Or I could make friends with evryone in a game and while their busy building buildings I will take my tanks, and kill their cities. Then I will whip them to death. Or, if I'm happy, I don't have an engaging conversation with my kids, I play civ4 and make peace with everyone, donate them lots of stuff while giving my cities lots of happy faces. If I'm tired, I start a game on the easiest level and play mindlessly. If I'm energetic I play the game on a hard level and calm down.
Civilization IV also gives me more alot free time. So when I go to birthday parties, graduation parties, etc, I always get them Civ4. Most people I know doesn't like it or has it already so they kind of slowly became not my friends, giving me more time to play civ. It has also freed entire days because the mind-controller in the game has sometimes decided that it would make make it physically impossible to get off.
Civilization IV has given my many good traits as well, for example I have become someone who always wants to beat up everyone else. So I have gotten stronger. I also now can make very good decisions. For example, if someone punches me in the face, I get a group of people and axes and we start beeting the guy.
I have also been made smarter by this game. I no that the Americans existed at the same time as England. I have also learned that all civilizations in the world were created at 4 BC. I also now that every civilizations learned exactly the same techs and have exactly the same buildings and units except for a select few. I also learned that one universal lanquage is used throughout the planet.
I am also a much better financial expert. For example, to research technologies faster you just need lots of money. I also learned how gold is the only currency in the world and that is only what it will be.
Civilization IV basically makes my life complete by filling in any time not needed for survival. I will also be very successfull in the world because of what I have learned. It's also given me the friends that it took a way by giving me friendly rivals to compete with. It also helps me get my emontions out. So, It pretty much makes my life complete because it is my life.
