The troubled figure

I have a riddle. Can you solve it?

Put the pieces together and you just might get it.

He is bitter and cold on his worst of days.

He is bright and sunny like the suns glowing rays.

He makes bad decisions but never can be blamed.

No matter what, he has his head in the game.

You may want to fight him but he'll fight right back.

So you better choose wisely when you choose your next attack.

He sometimes feels good and sometimes feels bad.

If you break him down he'll for sure get mad.

He falls down and his friends help him up.

He doesn't care so he raises his cup.

He doesn't want to do it later; he wants to do it now.

Even if you can't; he'll get to it somehow.

He'll go through pain; he'll go through sorrow.

He'll be better by today or tomorrow.

He we'll change and try different things.

Either way he'll soar with the new set of wings.

To you this could be anyone; or no one at all.

They could be big, short, tall, or small.

But to me this is me; as imperfect as ever.

And to me I will be this way forever.