njrick:
Interesting topic, because most of the classifications are different from those you can use the search function for (playful, grave & serious, bizarre, banter). Of course, having tried them all as an author, I must, in complete modesty, admit that I'm best at all of them.
Rick is right, of course, as he is a very versatile writer, but first and foremost I think of him as the master of humoristic and romantic stories, often with a quite surprising twist. If you want to give him competition, you may try PhilK.
Other names that come to mind are Bashful Bob for wild and crazy (but somehow quite plausible) serials about the dangers of settled, suburban life; Blimp for the intense and lopsided battles between female teachers and their lovesick students; and JessicaK for psychological family sagas. For the bizarre, I think Barretthunter is hard to beat (especially if the bizarre includes an oversize bottom), and I enjoy stevenr's stories for their adherence to everyday life. If you want erotic encounters between teenage schoolgirls, TheEnglishMaster is hard to beat, as is Gail for intense relationships between more mature women. Spanking Theatre is probably the most artsy author here, and I have always loved Carolina Jim for his creation of a world of teenagers and mothers where spankings work exactly the way spankos think they do.
And then there are all the writers I haven't read, and those that are so good at everything that they are hard to classify, like Flopsybunny, Susan Thomas, Neil, and Alan Barr.