clarkkent,
Seems to me you may not find all the answers your looking for from a single post of questions. Perhap's first, you might decide which asnswers from researchers are the ones making most sense to you, as accepting all or most answers from so many varying opinions of Ufologists could lead to a mind-melt-down.
There could be 27 or 127 or more varieties of EBEs here. My work attempts to stay within four or five to help keep my sanity and remain focused, i.e.:
Draco Reps
Greys (small)
Greys (Large)
Tall Blondes & Nordics,
and odd species out of the main stream but within a big report such as Chupacabra. As soon as I read any particular EBE/UFO High Strangeness researcher bases his research interest on his own abduction experience -- I run. This includes Strieber and Greer.
I suppose one way to home into some truths regarding this area is through process of elimination. Round two might be the intense research effort to find similarities through CE1-4 reports, descriptions of EBEs, Craft and stuff. Research is everything in this area and in the end may not offer the answers one might have expected to find at the getgo?
RSF