I really liked Sundiver, Startide Rising and managed to enjoy Uplift War. But the concluding trilogy just got to be too much for me.
This. Read it all-but damn he goes to some strange places in the second trilogy, if you will call it that. I enjoyed Uplift War and Startide Rising a lot. Sundiver was like early Piper to me-a hint of what was to come.
I think Scalzi is hovering around the Trap. His book sold(Old Man's War) and he's being tempted w/monetarily to keep the franchise going even though his creativity will be, in the end, stifled. Check Allen Steele and his Coyote series-done a while ago, but he's still milking it.