Answer:
There are four of us but it seems like everyone loves spades the most.
You seek me out when your hunger's ripe. I sit on four legs and smoke a pipe.
I am the only thing that place today before yesterday. (one word)
I am commonly abbreviated to H
What word when read from left to right is a ruler, but when read from right to left is a servant?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.