Oh lets see... the one I think will always be on my board (subject to change on a regular basis of course
) .... right now I gotta say the DRD is my desert island. While I can easily justify having any/all of my current ones on the board for a gig, this one is the one I dont really see myself pulling.
I think of all the drives I own from BJFE--- HBOD, DRD, EGDM, MH... the DRD has the widest range in gain. With the exception of the EGDM.. they *all* clean up very well with the guitar volume... but the DRD has the most raw sounding higher gain sound available than the others. I can set and forget with this pedal-- avoid tapdancing... and just vary my tones from the guitar.
If I had to have only one, this would cover the most ground for me.
So far I havent gotten rid of any - except the MH- and I ended up buying it again as I suspected I would the day I dropped it at the post office. Live and learn. As thesjkexperience said--- aside from major financial problems I dont see getting rid of any -- unless perhaps to fund other BJFEs on my wish list.