Well, the HH Explorer appeals to me do to it's longer length and the bottom entry.
The WBBB's appeal to me due to the webbing suspension, longer length, footbox, and the double layer (I want to put a pad in between the layers rather than lay directly on top of a pad).
Now, I say all the appealing things due to reading up about them here on the forums and on the Warbonnet web site. I have only seen them in pictures. So I am taking somewhat of a risk just going by the listed features.
The Hennessy Hammocks are more of a known issues (or comfort) since that is what I have.