Small riddles - What could it be?

[M_i_k_e]

Hehe, sorry... I'll wait with my next answer for an hour or something to let others guess ;D You are fast as well I am very important for you,Though you can't see me.You don't notice, or care about me,Unless you loose me.

air ?

 

[Vattier]

nope

 

[ifayra]

heartbeat, conciousness or breath

 

[Vattier]

NO! At last You didn't solve my riddle with first try ]:->

 

[ifayra]

what about life?

 

[Vattier]

No... umm... what a pleasure to say that xD

 

[ifayra]

Blood?

 

[Vattier]

No! xD

 

[ifayra]

You could lose your head, but you can see it in a mirror, so no idea anymore

 

[st_ghost]

A secret?

 

[Vattier]

No Wanna hint?^^

 

[cassandra31eee]

I am very important for you,Though you can't see me.You don't notice, or care about me,Unless you loose me.

sight

 

[Vattier]

No.HINT No1: Ifayra was close... well all of You are close^^

 

[paskudnamorda]

Health

 

[Gamewidow]

your mind ?

 

[Vattier]

Health

Bullseye!

 

[FateWhisper]

Very interesting topic. Let me tell you a riddle. The one who made it,didn't want it.The one who bought it,didn't need it.The one who used it,never saw it.

 

[cassandra31eee]

A coffin. ( brrrr)

 

[FateWhisper]

A coffin. ( brrrr)

That's correct!

 

[cassandra31eee]

Here 's another:I have holes in my top and bottom, my left and right, and in the middle. But I still hold water. What am I?