Well, here's how my idea would go:
Character Creation:
To start with, you wouldn't create your character, the game would take a picture of you and then deform your face to the point of having nearly no similarities at all (yeah, recall something like that?), it'd pretty much be a caricature of yourself. You'd also be required to input your job, favourite colour and favourite food (each out of a list the game would provide you with).
Genre:
The game genre would be an RPG with skill trees, however you wouldn't allocate skill points, rather, they'd be automatically allocated depending on your choices during the game. The combat would vary depending on the locations, for some it'd be turn based while for other it'd be an action rpg (for example, if you were fighting in a bridge, it'd be turn based, since both you and your enemy would have to be careful with your steps, while if you were in the street or somewhere safe, you wouldn't have to worry as much).
Skill Tree:
Each of these skills would increase or decrease automatically, depending on your game choices, here's how they'd work out:
Hunger - If you don't eat often, your hunger increase, when you do eat though, it decreases (if you don't eat anything at all, you'd eventually get a game over).
Boredness - If you don't do anything in the game, just wander around aimlessly exploring things, your boredness increases, however if you venture into an actual quest or fights, it decreases.
Coolness - Wasting money on useless clothing, accessories and weapons, increase your coolness, if you only buy strong weapons and clothes, despite them being ugly, well... Your coolness decreases.
Cowardice - This one is quite obvious, running away, avoiding enemies, going through safer, although longer paths and things like that, increase your cowardice, however being brave and never running away, decreases it.
Rudeness - Sometimes during the game you'll have annoying NPC's or objects that apparently just want to screw with you or annoy you... At those times you'll have the choice to insult them and be a jerk, if you prefer to remain polite during those times, it'll decrease.
The point would be for people to try and equilibrate everything, a lot of something could be dangerous like in real life, just like a lot of nothing would.
Personality:
Remember the choices where you had to input your favourite colour, job and food?
Well, those affect your personality among some other things, for example:
If you were a clerk, you'd be bored more often;
If you were a sportsman of sorts, your coolness would increase;
If you were a beggar, your hunger would increase;
Among others, jobs would give you some constant perks and cons, the only jobs that would have no perks or cons whatsoever, would be students, teachers among similar jobs.
The colour would affect your personality in a similar manner to the jobs, if you bought a weapon or clothes that have your favourite colour on it, it'll increase your coolness.
As for food, your favourite food will fill more your stomach, so your favourite food would be the food that'd decrease your hunger the most... It'd be useful if your character was nearly starving to death, whereas normal food wouldn't be very helpful.
Story:
Here's where the tricky part comes, there isn't much of a story to begin with, the basic setting would be that the planet where your character lives, was being visited by a large technologically advanced civilisation of Eggs, alien eggs. Your character nonchalantly sees a baby alien egg and thinking it was a normal egg, makes an omelette or scrambled eggs (you choose which one), with it. By doing that you unknowingly become Universe's number one enemy, and pretty much everyone will be trying to kill you... Be it for money, fun or revenge.
Depending on your choices during the game the story setting will eventually change, you could become your planet's hero by expelling the aliens, you could destroy the entire planet, you could join up with the aliens, you could run away to the underground or you could simply apologise to begin with (and the game would end with you being arrested and taken to court by the aliens).
Well, I might add some things later on... Dunno... While this is one game I'd like to make myself, a lot of people wouldn't understand it at all. xP