It would attract more people if you make a neat survey form imo. But I will help you to answer it.
1) Why are you using Bitcoins? Do you consider them as an important part of your life?
Initially, I using it for gambling because of its anonymity and another features. But now I have been using it for few things. And yes, it has become an important thing in my life.
2) What bitcoins are about to you - is it a way to challenge the system?
A revolutionary thing who can make you having full control on your own money. What 'challenge'?
3) How often do you buy goods with bitcoins? Did Bitcoins change the way you buy/sell goods in general?
Not too often, and yeah with bitcoin in some cases, buying goods become easier and more efficient
4) What about the press, do you follow the coverage on mainstream media about bitcoins? Do you think that the coverage is portraying the issue in a responsible and precise way?
I don't care what media says, I keep using it.
5) Do you use mining as well or just buy Bitcoins?
No, mining is not efficient in my city
6) Do you perceive any threat to the Bitcoin system? If so, which would those be?
I don't see any threat to Bitcoin except some bad news from media about bitcoin that be used in black market. But I think it can't give any effect to bitcoin.