Answer:
Though I should be unique, you've made most of us the same. I would be stronger, if my characters were stranger.
I'm a starchy plant tuber that is one of the most important food crops, cooked and eaten fried, such as french fries.
What has 4 fingers and a thumb, but is not living?
What can be white and yellow at the same time?
What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.