I use craft acrylic paint , I paint with a brush and find they work very well. I buy from "bargain bins" they are cheep and with the aid of an Artist Colour Wheel I find I can mix and match quite well.
I have tried some of the special paints and found they do not work very well for brush painting, especialy Tamiya; altho' I have heard that Vallejo ? paint is good for brush painting.
Certainly painting with a brush is not as good as to what you can obtain with an Air Brush but I cannot afford one neither do I have a place where I would be able to use one, so I must stay with what I have!.
I wish you luck and as always, practice, practice...cheers....Kenny