Stu Redman, Tom Cullen, Nick Andros and Larry Underwood - The Stand
Claire and Jamie Fraser.
Simon Snowlock - Memory, sorrow and thorn series
Ayla and Jondalar - Earth Children
Eddie & Susanna Dean
Jack and Oy
Roland all from the Dark Tower Series
Bridget Jones
Hermione, Ron, Harry, Mr & Mrs Weasley, Dumbledore, Hagrid, Neville and Ginny.
Theo Vilmos - War of the Flowers
These ar just a few of the ones I can remember. I usually love the majority of characters in a book, but not all of them stay with me, which maybe a good thing considering the amount I read