Was talking to a buddy yesterday. He had met with a few modeling friends the day before, and they were riding him for being so old-fashioned and not going to acrylics exclusively, like they did (he does use acrylics, at times, but also uses enamels a lot).
We compiled a list of what we like about Testors enamels;
Easy to find (even at Michaels for the regular, non-model master line), with good selection of colors
Easy to thin
We can brush small parts with good coverage.