Use of var keyword in C#

Answer 1

It's not bad, it's more a stylistic thing, which tends to be subjective. It can add inconsistencies, when you do use var and when you don't.

Another case of concern, in the following call you can't tell just by looking at the code the type returned by CallMe:

var variable = CallMe();

That's my main complain against var.

I use var when I declare anonymous delegates in methods, somehow var looks cleaner than if I'd use Func. Consider this code:

var callback = new Func(delegate(IntPtr hWnd) {
   ...
});

EDIT: Updated the last code sample based on Julian's input