The flakes of Unique or another powder are only a problem if:
1) the accuracy sucks
or
2) kernals get under the star on your revolver's cylinder.
I find that despite the flakes, 5.0gn of Unique is quite accurate in several different cartridges and bullet weights. I have never had a malfunction due to Unique and it has never shown any pressure spikes like several new powders tend to.
I wish that I could say good things about Bullseye, but it just wasn't accurate in any of my .45s or .38 Wadcutter loads in the late '70s and I have never bought more. I find AA2 to meet all my handgun accuracy needs--except for magnums where 2400 has always been a stand-out in .44 and .45 Win Mag.
Aesthetics should not be a criteria to select a powder.
I don't really care about aesthetics. I merely wanted to find out why some old ammo I have, that is still plenty snappy, tends to leave little (apparently) unburnt disks of powder all over the tops of my hands and arms when I use it.