Personally I used to believe. I mean, obviously not 100%. But deep down, devouring every single abductee story I could find, watching through the telescope in my room for UFOs (awww, isn't little Senator cute?). Believing them in a "so many people can't be wrong" kind of way.
Now I for sure, don't rather than do believe, because of a specific train of thought.
You see, the problem is that now, I have read a lot more of "new generation" Sci-Fi authors, who, are on and on about Transhumanism, the Technological Singularity, nanobots, universal constructors, nano fog-lets, uploading, computronium, and to sum up. Frankly at this point, I am not even sure if humans will "colonise the solar system" or is even worth the effort.
The point is simple:
Computronium is awesome. And nono clouds and universal constructors are awesome. And uploading you mind into a computer is also awesome. Because what you have then, is a technology you can make very tough and reduntant, taking very little space, getting rid of silly organic bodies, and switching in and out of virtual reality world with physical laws you control.
(For the record, computronium is just a buzzwords for matter, arranged in such a way as to have maximum information processing ability per volume. According to some of 'em authors. 1kg of it should have enough ability to simulate, not only a human brain, not only all human brains on earth, but all human brains that have ever existed, so you get an of how much computational ability that one is)
This means, that my idea of an advanced civilization now, is far more likely to have spaceships where the crew compartment is thumbdrive sized. Inside of which crewmembers will be living in a reality where each one has villa on a hill, surrounded by a forest. In fact, you can simulate an infinite amount of environments which would technically make it feel more spatious and less restricted than an entire planet. In fact, with that technology you don't need planets any more. Why colonise when you can colonise your own computronium? The only purpose for every other matter in the universe is to be converted into more of it, or energy to power it up.
In other words, I find it far more believable now that, that there is a cutoff where, after a civilization beats around in animal form for a while then, blam it goes and converts itself into a dyson sphere cloud supercomputer kind of thingy, as opposed to going around in Federation ships with captain sitting in comfy chairs while living their poor tactical officers standing.
I find it hard to believe then, that the Greys, being an advanced civilization would be fooling around with organic bodies and saucers. Even the medical examinations are starting to sound too primitive to say the truth. Not when I am seeing research of nanobots with cells grafted on them (so they convert glucoze from the blood into energy, easier than carrying batteries) being done right now by us.
The only way the Greys would sound believable to me, is if someone said to me (my theory btw) that it is the Flying Saucers themselves that are actually intelligent, and the Greys are nothing more than robotic, remotedly controlled manipulators for the physical world. They look organic, because good robotics would look so anyway. (Biology is already very good nanotechnology. In my definitions of a "robot" I see no reason why it has to be made out of "metal")
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No, I haven't smoked anything.