Everything in chassis setup is a balance.

When it comes to front toe, Toe-in will add to straight line stability, but it won't "commit" to corner entry as readily, sometimes making it feel as if there's a "delay" between your input and the car's reaction. If you "chase" the car's steering on the straight, you can actually hurt straight line stability because weight is transferring side to side and every time you center the steering, the outside tire is going to still try to drive toward the car's centerline.

Zero toe can add it's own inconsistency as every steering input will have a delay until any suspension/steering slop in the linkages is taken up by the cornering forces. On the straight these forces are a lot less, so in extreme cases the wheels could fight for control with the amount of slop available and make the car do all sorts of strange things.

Front Toe-out can be thought of as adding a little "pre" akerman angle. It should be relatively stable on the straight, but be willing to change directions very willingly while still being in complete control. Because of this, steering corrections should be kept very small on the straight because any steering will happen without hesitation.

A pretty standard front toe setting for me is between 0.5-1.5 degrees toe out TOTAL. Opinions vary widely, but almost everyone will tell you to run front toe-out.

Rear toe is nearly always toe-in for stability. On acceleration, the most weight transfer is to the rear, so the suspension will try to share the load between the two rear wheels, which will in turn apply power toward the car's center-line. Less rear toe will limit how much the rear "digs in", which effectively loosens up the car, too much rear toe can overheat the tires and lead to an overly loose car as well. Normal range for this is between 2-4 degrees per side per most manufacturer's base setups.

I suggest that toe angles should be set to a recommended value [manufacturer's base settings] for testing, and be used for fine-tuning your setup, unless your tires indicate something is very off, once the rest of your setup and testing is complete.

Hope that helps, again, there's lots of opinions on this subject, this is just my views.