Problem is, no one paint type is normally good for all applications (although some come close).
Tamiya acrylics airbrush wonderfully; however, brush painting is a real pain.
I generally brush paint with Polly Scale and also have been dabbling lately in Vallejo.
However, If a starting modeler (not saying u are one) asked me to recommend a good general paint, I would recomend Polly Scale every day. Polly Scale has a great range of colors, are generally accurate, brush well, airbrush well, dry fast, dry tough as nails, and won't dissolve when you brush on another layer (unlike enamel, yuck!).