I have just finished The House I Grew Up In (Lisa Jewell) and I liked it but I couldn't stand Meg, the oldest daughter.
I got the feeling she'd really, really annoy me if I knew her
Smug, judgemental, bossy and mumsy.
I also didn't like Jill, of the Ruby Ferguson pony books, as a kid. She was always so intolerant of anyone nervy round horses!
Who are yours? I'm sure I have more ...