I love the tattoos, but I can see how that would be a pain to draw because you'd have to make them the same every time. My hat is off to you!
I always have a hard time drawing a mustache without making the character look like a 1970's porn star. It's hard to make one look "normal" for me.
Some of my characters have heterochromia (different coloured eyes), It always makes me feel weird to draw them in profile where you can only see one eye. And, I don't know if it's a factor of me being right-handed, but it's always the right side that I tend to draw
I happen to be an action fruit... except maybe not so much the action part...
I am very much like that with the title for my first story. Being an LGBTQ story I wanted to include the colours of the rainbow. The problem is that the title has more letters than the rainbow has colours (I use the traditional ROYGBV rainbow) so I try to fade the colours to spread them out. Instead of Red-Orange-Yellow-etc I do Red-Reddish Orange-Orange-Orangeish yellow-yellow-etc. And it comes out different every time I do the bloody title. I finally cottoned on to this and saved it as a scalable vector so that I can resize, tilt, etc as necessary but before I did there was zero consistency. Just compare these two images, paying particular attention to the last few letters in the word "Nights". The letters
H, T and S in each image are completely different colours.


Don't give them contacts! I love glasses on people. Always have. It is not a coincidence that the character that I consider to be the most attractive in my story wears glasses (this is the character that shifts into that cheetah I showed in another
post):

That similarity works in a story like yours, though: If you look at any army the soldiers all look the same. Heck, look at the Stormtroopers in Star Wars! Or look at the different ranks in Star Trek (which has me worried for the dude with the red on his uniform)