Lane question: If you are driving a good 10-15 mph faster than the rest of the cars on the road, on
 

a 3 lane highway, and if most of those cars are in the far-right lane, which lane do you drive in?

By principle, keep right/pass left, but if you're passing people pretty quickly, I think it's safer to stay in the left just in case someone pulls out, or just to open the road for them. Obviously if someone came up behind me then, I'd move over and let them pass.

What do you guys think?

Left Lane, if your paying attention and will move over when a faster pinto comes up behind you
 

I don't care if your in a lambo, if your travelling at 85mph and I come up at 100mph in a geo metro, don't speed up, don't let me force you to a speed you were not going and or are not comfortable, move your ego ass over, let me pass, then come back over into the lane doing your 85mph!

I also like the middle lane as well, but yes people are idiots so yes people will not judge your speed correctly and yes they will change lanes without using their friggen blinker or hell any common sense. Drivers suck period!

However if I'm trying to stay under the radar, I'm not in the left lane for long periods of time, so I will be in the middle lane or the #2 lane on a 4 road for a lot of my journey

I'll drive in the center just to set an example for everyone else. Sometimes if you're on the left
 

and there happens to be traffic in the center and someone faster comes up behind you, if I'm in the fast car coming from behind I'd be annoyed as heck;

10-15 faster, center lane. 20+ faster than others, left lane.
 

You have to pay more attention when you're driving fast in the center lane, but you have the left lane as an "out" if you need it. For excessive speed 20+ faster, I try to stay as far away from everyone else as possible.

stay to your left