I guess I should have been more specific. While the bands are all somewhat similar in very general terms, I noticed (and judged largely based on) a difference in vocal techniques especially noticeable in the specifically given songs. Serj Tankian of System of a Down sometimes, including in "X," implements an extreme metal vocal technique of harsh, guttural vocals (I don't think it's quite growling, but it's a similar technique). Rage Against the Machine is a rap-(rock/metal) band. The vocal styles of both songs differ from the rest of the songs, consisting of the genres punk, metal, alternative, and plain ol' rock which rely mostly on the more traditional vocals of the genre that they represent.

1. This applies to me.
2. This applies to me.
3. Well I tend to avoid gatherings if possible, but when necessary I prefer the smaller groups if consisting only of close friends or larger groups of people I don't know. That way I either talk to someone who knows who I am, or I avoid talking altogether.

Obviously, I am a bit of an introvert (okay, a significantly larger amount than "a bit"). Put me in a room of people and in less than a half hour I start to wither away. I've recently started college and am dorming with a friend of mine. It feels like the walls are caving in on me; he's always there... At this point I'm hoping I don't fall into a deep depression before the end of the semester. It kills me...

Your son has good taste in music in my opinion.

I would guess either X or Testify. X because of the harsher vocals and Testify because it's a different genre from the rest.

Community is something that comes up a lot on atheism blogs, especially here I think (or it just as easily could be elsewhere). I represent a small portion of society who take their introversion very seriously (so to speak). The idea that imbibing atheism with a sense of community and a societal group is confusing and largely repulsive to me. Growing community completely leaves out the introverts, especially any that take introversion to a rarely heard level, and would repel us so far from any event acting under this attempt of camaraderie, that you'd never see us again. Or it could be that I'm the only one who has ever felt this way, but even so, it should be known that no single plan is foolproof so as it would not leave out someone. I know that if atheism for some reason required social interaction beyond what is needed for comfortable survival, I would immediately cease to be one. It was one thing that appealed to me most about atheism when I first was searching for a new path in life: no church, no community, no crowds, nothing required, I could actually be alone, I could keep my privacy, I wouldn't need to explain myself, I wouldn't need to repeat myself to people who couldn't hear me (again). I guess at this point I sound like an old hermit... oh well.