There are so many different types of paint to go through, and so many different brands. And the prices go from $1.50 to $20 for a little tube. So experimenting can get quite pricey if there's not a good way to bring the choices down. What I've settled on is a type of gouache, which has a relation to acrylics. It has so much more pigment! The yellows are the most impressive with this one!
I've also given a few new brushes a shot from Beste. They're still very tiny, with most of them going from 0 to 10/0. It may just be my excitement, but they seem to be able to give me a bit finer of lines with a bit more reliability (as in the dragonfly wings)