A1. This is something 3 year old me would have liked.
A2. This is something the 3 year old me would have liked.
B1. She doesn't particularly like sweets. But her sister, the three year old Amanda, enjoyed them very much.
B2. She doesn't particularly like sweets. But her sister, three year old Amanda, enjoyed them very much.
C1. The book was written by popular writer C.S. Lewis.
C2. The book was written by the popular writer C.S. Lewis.
Which sentences sound natural? And why?