I am a huge fan of OSC. I dig the Ender books, the originals. Ender and Speaker for the Dead were good books. The rest of them, including the Bean books, sucked.
I read a couple of Alvin books, couldn’t get into them.
In general, his series books tend to be stretched out. Sometimes they seem like they are milking the story.
That being said, The Worthing Saga is one of the best books of science fiction I’ve ever read. It truly is genius. I highly recommend it.
A couple of his other one shot books, Treason, Wyrms, Lost Boys, are really good. His short stories are great too.
His mormon religion heavily influences what he writes, though. His Homecoming series is basically a retelling of the book of mormon. It starts out really good but the last three books are boring and weird and dumb.
His book about the early days of the LDS church is really insightful. It’s called Diana, I think. It almost got me to become a mormon. And it offers an interesting look at the polygamy stuff.