Other than various blades left over from a sample pack, the most 2 brands I currently have are Astra and Dorco. I have a 100 pack of Feather on the way so I am good on blades for a long while.
Feathers, Astra SP, Voskhod, Gillette Silver Blues, Gillette 7 oclock Blacks, and recently... Treet Platinum and Israeli Personnas.
WARHAWK
Not a lot really. Some Derby, Feathers, Astra. Probably about 40 in total
Astra, Derby, Voshkoa and Wilkinson
Got a sample pack of 3 blades.
Astra superior stainless ( My fave so far)
Blue bird Chromium-ceramic-tungstan-platinum and polymer coated edges ( Edge doesn't keep as well)
Gillette 7 o'clock Stainless ( next to try)
I actually have a nice selection at the moment. Through a couple of sample packs I purchased up front, an assortment I picked up from
www.tryablade.com after buying my 37c, and a couple of PIFs that I've won, I've acquired over 100 blades. See selection below. I'm in pretty good shape for having selections to try with the Fatboy and the DE89 that I just picked up.
Green means they're in my top 3 so far. Red means I still haven't tried them in my 37c since making it my go-to razor.
Personna Red
Astra SP
Treet PlatinumDerby
Crystal
Gillette 7'Oclock SharpEdge (Yellows)
Bluebird
DORCO ST-300
Personna Blue
Gillette Silver Blue
Feather
Polisilver Super Iridium
Perma Sharp
Voskhod
Lord Platinum
Rapira Platinum Lux
Wilkinson Sword (India)
Shark Super Chrome