i liked Blackbuntu but love backbox, reason is, not as much "desktop" stuff on it, very clean layout, easy to navigate etc
i spent too much time tho "tweaken" backtrack and at least on my lappy, some of the updates hurt my setup with blackbuntu
after spending more time "tweaken" and not "testing" it got old, don't mind the work of learnen, but to me, by far, this is the most
"clean and stable" pen-test distro ever used, hope this helps
LT