You are doing quite well in my opinion. I did not know anyone was reading my replies to everyone. I am not always constructive, depending on what people are writting to me. If there is something interesting else to say other than "thanks", I sure will as I'm never satisfied saying the least. Humphehe. *amused*
I think it is: The way your eyebrows arch over your eyes gives you a rather intense stare. Then there's the stark contrast between one "normal" eye and the other _bright red_ eye with the supernatural marking. All of these features combined, I think, present you as intimidating, but in a good way. It shows Mukuro means business!
I've noticed your facial expressions enhance whatever cosplay you're in at the time, as well, and I think that definitely makes the characters you portray come to life. Your Yuri Lowell looks kind and mischievous (which he is in the game); your Shiki looks subtlely bloodthirsty (although it's pretty obvious in that one pic! *lol*); your Kuja looks delightfully arrogant and deliciously _wicked_; and I could go on and on.
So, in my opinion, it's not just the aesthetics--I think you, personally, bring something extra to your cosplays. It's difficult to say what exactly *it* is, but hey, _I_ know it when I see it, at any rate. So, whatever you're doing, by all means, please keep doing it. ^_^