There must be some strong personal opinons being talked on this forum that I have missed out on - and then being repeated by others who haven't tried these items out for themselves.
Most of the BKP pickups sound awesome tuned to regular tuning - especially when on the right guitar
I never play below drop-D or D standard and 99% of the time my guitars are all in regular E tuning and I have never had any problems with any of the pickups.
Having said that I can see that ones that I found didn't sound so good in a particular guitar at that tuning but sounded fab in another guitar may well have responded to a lower tuning & heavier strings better in the first guitar.
So for example your Nailbomb may sound too muddy in your Les paul but sound fantastic in your superstrat.
It is dangerous to write off pickups that you didn't like in a particular guitar assuming that they don't cut it when in a different guitar they would sound awesome.
I recently had a set of Aftermaths in my Ibanez S470 and I wasn't too fussed on the sound but switched over to Painkillers and it was fab ( I will put the aftermaths up in seconds out shortly)
Sadly sometimes you have to experiment a little to find the ultimate killer sound
One persons experience with a set may differ wildly from your own experience as
1 they had them in a different guitar or different type of guitar
2 what they like in a guitar's sound may be very different to what you like
3 they used a very different amp to you
4 they play at a louder or quieter volume to you
For my own personal tastes I like Miracle Man, Cold Sweat, and Painkiller sets, along with Mississippi Queens, Mules, VH2s and Stormy Mondays, and have a liking for Emeralds, Crawlers, Abraxas too.