The legend that is Bobby Robson autograph story
shamelessly c+p'd from another site, but I'd heard it before I looked it up to post here:

A friend of a friend was at a Bobby Robson signing at Waterstones. He got to the front of the queue and started chatting:

"Have you signed many of these today, Mr Robson?"
"Oh yes! Thousands and thousands."

After having the book signed he walked out of the shop and then decided to look at what Bobby had written. He had written:

To Dave, all the best, Bobby Thousands
( I_Was_Mordred, Sun 19 Apr 2009, 23:08, 1 reply)

I think Gary Lineker once told the story
that he'd been signing books all day, then had to write his wife a birthday card. She was a bit annoyed that he wrote:

Best wishes,
Gary Lineker
(salvadorevincent, Mon 20 Apr 2009, 16:32, closed)