I think file sharing is fine as long as it is permitted by the original creator of the file being shared.
If the file is shared illegally but the person who owns the rights to the file is fine with it, I also think it is okay. However, if a file is shared illegally without permission from the owner, I believe it is wrong.
2. If you produced your own piece of art/song/movie, would you hold the
same opinion?
If I produced my own piece of art/song/movie, I think I would hold the same opinion. I would probably allow others to share my works illegally but would encourage them to buy them. At the very least, I would permit sharing files of my works after a few years it has been released because I would not really be making money from them any more by then.
3. Do you feel it is morally acceptable to download copyrighted material if it isonly intended for personal use?
I think it is morally acceptable to download copyrighted material if only intended for personal use. You will not make any money off of material that does not belong to you and the owners will not lose money because you are not sharing the file over the internet.