Crime,
Take a look at this link. It gives a great indication of what type of stool you should be aiming for!
I'm generally a 4, which is great!
The "perfect" stool in theory, should be a 4 shape, in that it's well formed and pops out in possibly 1-2 largish sausage shapes but the
consistency of that stool should be as close to toothpaste/ soft-serve icecream (more frozen rather than melted!) as possible.
Imagine squeezing cool toothpaste from its tube into a stool type shape (but on a larger scale!) and that's kind of what you're aiming for. Of course, just remember it's not always possible to get these stools constantly and even if they are more of a number 3 shape (mine are when I've eaten sweetcorn LOL!) as long as they are still
soft & easy to pass then that's OK too. Number 5's are also OK with me - but this is the Bristol range that should be what you need to be producing.
It really does depend on your diet hugely & it's been quite a learning curve with my diet to try and achieve this!!
http://en.wikipedia.org/wiki/Bristol_Stool_Chart