I love trying new soaps, so my collection is still growing. I do have multiple soaps from a single artisan. One of my favorites is WSP Formula T; I love both the performance and the scents, so I have 11 different scents.
The only soap for which I have purchased a second tub is Captain's Choice bay rum. The performance is not as good as my best soaps, but it is my favorite bay rum scent. Bay rum oil is in short supply due to last summer's hurricanes, so I picked up a second tub although the 1st tub is nowhere near empty. I do have some soaps I will replace when empty, but with so many soaps in rotation and so many more I want to try, that could be quite a while.
I have enough different soaps that I've only managed to kill a handful of full sized tubs, and have never cared enough to buy a replacemend for any of them. But, I do have some B&M Fougere Gothique that I would buy again in a hot minute were it ever to be re-released.
First Canadian Barbershop Taper Fade. It's the scent I like best.
Williams Mug. I like to stickify it.
Proraso Red (tub)
TBS Maca Root - by accident. I piffed one of them to my son when I got him to convert to DE razors. It's a good performer but I probably won't buy it again. I may get the new formula if it smells nicer.
Arko
Barrister and Mann Seville
Barrister and Mann Reserve Classic
Barrister and Mann Roam
Barrister and Mann Leviathan
Barrister and Mann Lanaville
Proraso Green
Proraso Red
Proraso White
Tabac
Taylor of Old Bond Street Sandalwood
Soaps I've actually purchased more of after running out (not been given or PIF'd) would be
MWF
Arko
VDH
Williams
soaps I've purchased multiple pucks because of a package deal:
Razorock What The Puck (3 different scents)
Col. Conk (4 different scents)