I am perhaps lucky in that I've come to prefer stubby handles, so many otherwise attractive brushes are disqualified.
My least favourite is the Omega 49 Pro, which I find to be clownishly large, in handle and knot. Way too floppy, and best suited for a theatrical prop.
My two favourites are a 24 mm SynBad in a Blue Lagoon handle
and a Stirling 2-Band Synthetic.
Simpson Wee Scot
This APShaveCo Tuxedo knot set in a Barbershop handle.
I bought this before I came to prefer stubby handles, but I like the knot.
I've also refinished it since this photo was taken.
What kind of shaving brush do you use? Tell us all about it!