What Am I ? [2 riddles]

Some stare through my window
Looking for a better view
Hanging by a thread
Or two simple arms

Others despise me
They look for an alternative
Masking their traits
With various colors

Proudly sitting on my pedestal
Or sluggishly drooping
I make anyone I meet
World's better

If you try to find me
I'm always near by
I could be right under your nose
Or above it

What am I ?

Let me open up to you

So I can reveal my knowledge

I could be your bestfriend

Or your worst enemy

I vary in shapes

And sizes

I am also well-rounded

I could be a fan, or a head rest

I sleep in a case

With others of my kind

Although I prefer to be caressed

And admired

What am I ?