the ears look odd because they're just SLIGHTLY too wide. considering they're swept back, they'd look a bit narrower.
the tail looks off because the curve isn't sharp enough. and rather than curling in a circle, it should be curling in a semi-circle. pointing to the right then arcing sharply and going left. to give that impression that you're looking at it from an angle. to the cat's skeleton, it'd be a smooth, even curve curling clockwise. . try it with the top of a glass. from above, circular. when you tilt the glass so you're looking at it almost from the side, you'll find the brim looks like it's curving sharply on the left and right. same effect.
you did a good job of capturing the cat's anger in the expression.
my advice: learn to be good at erasing, and don't ink till you know it's perfect. for the first point, i see a lot of half-erased spots around the fire. the latter, because, as you said, even if we point out flaws, you can't change them now. they're already inked.
as for the pic before, my main problem is with the rips on the pants. a bit too symmetrical IMO. as for the 294716 piercings, i won't comment. my personal opinion is that more piercings mean more potential advantages to anyone you happen to fight with. more things to grab and yank and rip out

the arm looks funny though. right arm. around the elbow. seems a bit wide, don't you think? an arm around half the width of your entire torso is usually a bad thing

aside from that, there's the usual problem of the telescopic neck. but i'm sure you're already aware of that...