Natural colored BFLs are really English Blue in pattern (Aeb) and that pattern can be very dark to very light. I have both ends of the spectrum in just a few specimens.
The BFLs are just big dogs in wool jackets. They are inquisitive, friendly, sassy, and tame by nature. They accept handling quite readily and free stack naturally. Unfortunately the photos below are not all perfect as I can't see what I'm doing from in front of the sheep (yes that's my red arm).
WS&WF Reserve Grand Champion Natural Colored Ewe 2009
2010 Micron results: AFD 28.9, SD 4.6, CV 15.9, CEM 8.3, SF 27
Burma's fleece below (apologies for blurriness)
2010 Micron Results: AFD 27, SD 5, CV 18.5, CEM 9.2, SF 25.8
(her wool on her rump was quite fluffy today, she is level)
2010 Micron Results: AFD 26.3, SD 5, CV 18.9, CEM 8.5, SF 25.2
Kacy's fleece below
2010 Micron Results: AFD 27.9, SD 4.5, CV 16.1, CEM 7.7, SF 26.1