There are 2 locations that I have seen a change in hits/misses.
1) In front of the mob -- In a certain size arc of the front of the mob (not sure on exact or even approx #) the mob will be more defensive. This is where you get riposted.
2) Behind the mob -- The remainder of the circle. There is less defense back here, no ripostes and chance to hit seems better.
Could there be more variable? Possibly, but I've seen none documented.
For a point by point --
Quote:
- I can't help but thinking that my character is hitting a mob more often when i step back a bit every time i miss a blow.
Possibly just updating your location with the server. Other than small things like that, this wouldn't seem likely. (I move around all the time on my tank, and haven't seen much of a difference).
Quote:
- I think that the character has a better chance of hitting a mob when he is seeing his face (especially for small races like gnomes).
Stubby is a gnome. I haven't seen a mob's face since I stopped killing large rats ;). I don't even see the knees when I tank Kael. This hasn't caused me to miss any more than on the few shorter mobs that I might be able to see the chest on. (Also when Stubby becomes Gnomezilla (growx3) I can see no difference in hit rate. (Hence the /shout, Death! Death from the Ankles!).
Quote:
- I think that the chance of hitting a mob is smaller right after taunting it.
This would suggest about the frontal defensive arc of the mob. Upon sucessful taunt, he faces you. So, yes, it's a good chance that you will hit less. If you are hitting the taunt key when you have aggro, you are wasting it. (With the only exception of maxing taunt per level, and then you should hold off mashing taunt until you have firm aggro).
The best thing to remember. When you're tanking (that is, taking the damage and holding aggro, not just meleeing), your job is *not* to purely do damage. Your job is to hold the aggro and take the damage. (Aggro is a funny thing, but despite popular belief, not determined by pure damage output.)
If you find chances to parse this (using a log parser such as www.yalp.org) you will get a better idea of the truths therein. It's very difficult to judge by eye as there are quite a few things going on at the time.
Of course, lastly, you may very well be correct! And have stumbled upon previously unknown aspects of tanking and dmg dealing.