How high should the hands be???

Please excuse my ignorance...

How high should the hands be kept while fighting? I have been shown that you are suppose to keep them up around cheek level...

Although when I see pro fighter fight, I see people place them at different levels...

I have seen some at the chin, some at upper chest ( which feels most natural for me, but I may just be lazy ) some like Karate guys with one high and one retracted at the side while punching ( a la reverse punch), some even at the sides. I have seen some Thai fights ( from Thailand ) and TKD fights with the hands completely down by the sides....

So I ask, where should the hands be while fighting and training??

Thanks for all input....

excellent point sir...

Well put and good analogy..

thank you.

Good post chalupa and dont imitate Roy Jones can be very hard, recently my nose was broken by a kick for this reason.