From being on RF, defining labels gets grey. I'll address my comments to what I call atheist-materialists (that believe the physical is all that exists).
A) They are usually above average in intelligence.
B) Their view of life is depressing but they often have many ways to argue that that isn't so.
C) That many are started in their thinking by dumb sounding theism.
D) That they (like all of us) can become attached and defensive to their position and stop having healthy open-minded considerations.
I think these points describe a lot of what I have found unappealing about standard atheist/humanism that is widely promoted for a number of reasons:
1. Many atheist humanists are libertarians on economic issues, which earns them entry into right wing media and think tanks sponsored by wealthy billionaires.
2. Christopher Hitchens for one, went so far down the road of trumpeting "values of the enlightenment" which is taken as code word for European and Western Imperialism in much of the rest of the world, that some critics of Hitchens noted that his ideology wasn't new and radical, but rather a secular version of the old imperialism that had been promoted as "manifest destiny" or "divine right."
Most atheists don't come close to the extremes of Hitchens, Harris, Dawkins or similar promoters of "western values," but expectations of future human progress are as elevated as any faith-based ideology; except that in this case it's mostly undeserved faith in technological developments and human achievement. Virtually everyone - theist or atheist, seems to share faith in technology these days, but in atheist circles, we don't share expectations of future paradise after physical death, so faith that our descendents will have better futures has to substitute as the primary faith of atheist materialism.
And if you've been paying attention to what is happening globally in all aspects of environmental crises we have collectively created....especially increasing global warming, anyone who is seriously expecting a better future for our children and our children's children is living in denial or delusion, regardless of how rational and reason-based they claim their beliefs are! And referring back to point B, I see so little being done presently to prevent total disaster in coming decades, that I have no choice about feeling anxiety if not a true state of depression about the state of the world today. If I still shared the theology of my youth, I could casually disregard impending doom sometime in the future, since Jesus is coming back to fix our mess and put everything in order. But, being an atheist means being an adult about our predicament today.
There is no sky daddy or mommy coming into the room to fix up our mess! If we're not willing to find out what is necessary to ensure future survival and do EVERYTHING possible to make it happen...regardless of the immediate costs and inconveniences, then we are collectively already guilty of the greatest genocide of planetary history - because we will doom future generations of people, and very likely all non-microbial life on Earth.
And these dire future prospects are being increasingly discounted by many of the same people who claim to be forming their beliefs based on evidence, but have really created a secular faith in hope for change and hope for discoveries of new technologies, that it keeps them living in a fantasy bubble that is as separate from reality as the one created by those awaiting the 2nd Coming!
E) That their reasoning to explain away a great body of paranormal evidence eventually becomes even more difficult to believe than the belief that some paranormal things are 'real' and don't fit into the physical-only worldview.
The kind of materialism you describe here is physicalism...which begins from the premise that the forces and particles discovered so far in the Universe, are all that exist.
But, many materialists are naturalists - who don't by definition rule out what is presently called supernatural or the existence of undiscovered forces and particles (which I think is a good position considering what little is understood about dark matter and dark energy today).
But, as I see it, when we discover what dark matter, dark energy actually are, or find previously unknown supernatural forces, they are no longer supernatural! But are added to the body of information about the natural world.
