Favorite war!??
As Gen. Sherman once said: "War is Hell (a hell lot of fun...)" or something like that..
My favorite war must be World War 3-5, because they have never happened..
Your question is a bit strange, but if I have to pick a "favorite" war it must be World War 2.
I'm very interested in military history, and there is a lot of great examples of good and bad tactics there that we still can learn a lot from today.