My most admirable quality is I have fantastic taste.
That is, until some little kid,
decides to dine on paste.
When I'm quiet people always ask
if a cat's got a hold of me.
But that's silly - most cats have their own...
they don't need two or three.
Selling seashells by the seashore
often makes me rather twisted.
But give me a pickled pepper
and I simply can't resist it.
When I take a trip to the candy store
life's at its very best.
But when I go to the doctor,
I always get depressed.
What Am I?

Tongue, hope that helps !

Explanation:

Because, all of these deal with Tongue. The tongue is a muscular organ in the mouth of most vertebrates that manipulates food for mastication and is used in the act of swallowing. It has importance in the digestive system and is the primary organ of taste in the gustatory system. So, thats why I think its that.

a, a knight

the correct order is:

you're your own worst enemy:

they're going to say what they say, but

their opinions aren't holding you

back. it's your self-defeatist

attitude that's keeping your work

from getting its due.