but also a little frustrating sometimes.
I know what you mean about the scribbly-ness haha it's a word in our world. I actually did that piece so fast and intuitively and am a little scared to try to take those characters and do more with them because I don't know if I can replicate it 
but you know what, you're giving me the energy to try 
Hey @Kristen-Lango , thanks for sharing your portfolios with us!
My opinion:
As I assume you aim for picture book illustration I would put all pink rabbits together as one single work: a sheet of characters of the bunny world. - Additionally one might argue that maybe (I really don't know) an art director is not as much interested in character sheets as in illustrations that tell a story.
So I would either put them all together as ONE piece in your portfolio or get rid of them.
Same for the two character illustrations of the blueish-grey-green artist. BUT I absolutely love the character design, so ... for HIM/HER I would recommend to add some background for both pictures and add some visual storytelling so he/she can stay in the portfolio.
I would also put away the second illustration of the witch (?) cat with the worm. The left one is funny and tells a story and I love the hand gesture and facial expression of the woman. But the pic with only the cat standing in a stiff posture with the worm in one paw can't catch up with the left illu, so it should be removed. It looks a little bit like you exactly knew what you wanted the facial expression to look like and also how the paw with the worm should look, but for the rest of the intire body you had no idea and just draw anything. - That's why that piece is weaker than the left one. It would have been something completely different if you had put the other hand at the cat's hip, letting per push out her breast in pride or anything. Then the rest of the body would emphasis what head and one paw are telling. And to add consistency it would be good to also show her ears poking out of the hat. (Maybe you want to do that piece again to have two illus of that character in your portfolio, that's why I'm suggesting how you could improve it.)
And lastly I would remove the picture with the chocolate sea. The idea of the illu is really nice, but in regards of drawing style the humans you drew look so very different from your other humans to me.
But of course that's all only my personal opinion, I'm not an AD. Please wait for also other forum members wrote down their opinion! 