Here is my list.
Top Tier General Purpose
Sunlu/Jayo
Polymaker/Overture
Mid Tier General Purpose
eSun
Bambu
Special Esthetics
Ziro
Amolen
iSanmate
IEMAI
Engineering
Sunlu Easy PA, PC-ABS, …
Siraya Tech
Polymaker
One-offs
Gizmodorks - Fluorescent PLA
iSANGHU - rainbow ASA & marble ASA
ttyt3d/mika3d/bblife - silk rainbows
Creality - a few rainbows
Eryone - My top Marble. PLA Galaxy. Bad QC.
R3D - bi/tricolors
3dhojor (eSun) - unique matte pastel rainbows
Sovol - just the matte twister
Flashforge - burnt titanium (honorable mention)
Elegoo - rapid PLA in 5KG spools
BASF - BVOH
yxpolyer/Silver - they make a pure PPS
HELLO3D/COLORFUL 3D - has a hyper glitter I like
Very special cases - these are not recommendations
Stronghero - hard to print exotic freaky stuff
Yousu - has some freaky unicorn s— like stronghero
On my radar - not recommendations
Lovoon
Hello3D
Chitu (Conjure)
Tecsonar
Gryddle
Filament I’m meh about but other people seem to like
Tinmorry
Eryone - bad QC, bad support
Things I don’t buy even on sale
Atraxia Art
Reprapper
I’ll buy other filaments to try, but these are the only filaments I keep buying. Inland should be on this list and I’ve got all of their filaments in my tracking system, but I just buy their underlying esun/polymaker variant if I’m buying online. Don’t be afraid of Inland if you live near Microcenter.
About me: I move my filament on pallets.