Depends on where you go, but the general top 3 are marijuana, cocaine, and meth. Generally speaking, marijuana seems to be the most used, especially with it being easier to get with new legalizations.
It is a matter of opinion, I suppose.
We need jurors, of course, but with so many people who hate it, there surely wouldn't be enough if the goverment simply allowed whoever wanted to volunteer to be the jury. I suppose that makes it sound like a burden, as it's a goverment-ordered requirement, like taxes. It is a privilege, though, if you think about it. Being selected for jury-duty means that you're a reliable citizen of America and you're trusted enough to help make a very important decision.
So, to restate my initial response, Jury duty can be seen as a duty or a burden, depending on how one views it.
Sigmund freud proposed that little boys' fears that their fathers may retaliate against them for forbidden sexual and aggressive impulses may lead to castration anxiety. It is a fear of damaging or losing the genitals. It is concept proposed by Freud that a child would have a fear of losing their genitalia by a parent of the same gender as a form of punishment for having some sexual feelings toward a parent of the opposite sex.