All depends on what brand you're using.
Tamiya is a big nono for me. It dries so fast that I've gotten streaks on the second stroke!
Testors / model master acrylics require a lot of mixing to prepare them and even though they level out very well, but can only look consistent through an airbrush. If done througha brush on broad surfaces, flat/matte testors paints show a lot of slight silvering if you don't do it right. Oh, Testors also dries slow
Mr. Hobby from GS is the BEST acrylic paint on earth! Only because it is thin, it self levels almost as well as future, and the pigment is just right so that even one thin coat is opaque. Unfortunately, Mr. Hobby also seems to be alcohol based and dries out almost as fast as Tamiya. You can get one great coat on and hope you don't miss a spot because if you do it'll show when you patch it up >_<.