My favorite are the two different purples, the turq,fusia pink, dark blue, and the brown

Some like black, dark blue, and brown aren't really what I was looking for, but I like the variety.

Colors are nice, helps with studying and needing variety, but I did notice that most of the pens (except the black, red, and dark blue) would go in and out of using ink

I'd pass and just go with the black only -- the other colors (except for dark blue) are useless to me.