What have you read and what did you think??
For myself:
Ender's Game and companion books - what can I say but WOW! I still have about 3 to read I think. I read the series - Ender's Game, Speaker for the Dead (right?) Xenocide and Children of the Mind (yes?) and Ender's Shadow. Actually, I liked Ender's Game and Ender's Shadow best. The others got a bit strange IMO, LOL!
The Worthing Saga - very good, but a lot of rehash from other books. Actually I think the others were probably spawned by this but...
The Homecoming saga - Wow again! And then I found out it was basically a sci-fi embellished version of the Book of Mormon. Pretty wild!
Alvin books - I only read the first one.
Songmaster - another good one
Wyrms - eeeeew but a page-turner
Oh, and that one with the guy that can regenerate whatever comes off - starts with a D maybe? A page turner, but for me it wasn't a keeper.
Hartsomethingorother - another good library book (not a keeper for me)
Enchantment - COOL! I need to get my own copy.
My very faves, though, are Ender's Game and Ender's Shadow...