"When it comes to regret, most people seem to think that Frank Sinatra got it right: it’s OK to have a few, as long as they are too few to mention. Regretting too much is a far greater risk than regretting too little. However, there seems to be something of a double standard at work here, for when we look at people in public life, few things seem to raise the hackles more than lack of regret."The latest not-quite-weekly column