Verbatim natural is superb, but I have not had great results with other colors. Maybe it's me.
I like Meltink silver and gold a lot, and use silver for production. Nice metallic finish. Haven't tried other colors. Low cost.
JustPLA Studio line in yellow is excellent.
colorFabb PLA+PHA is great and very strong, but sometimes support removal is a little more difficult than other PLAs. Plain colors and transparent are slightly easier to extrude than loaded ones like silver, gold, and black, but I've done a lot with silver and gold too.
TreeD EcoGenius in bronze worked great for me but it's expensive to import to the USA and I haven't tried other colors.
Here are some I do not like - brittle, difficult support removal: MakerBot, Taulman, PolyMaker/Raise. Prototype Supply (eSun?) extrudes OK but layer adhesion has not been good for me compared to others.
Black seems to be the most difficult color to get a nice-looking PLA print from. Raise PLA looks great and matte on other printers but for some reason I haven't been able to get it to look good on the M200.