A running theme amongst all of the them is simply what a genuinely nice guy the ex-Lib Dem leader was.
Charles Kennedy. In a political age not overburdened with gaiety and good sense, he brought us wit, charm, judgement, principle and decency— Paddy Ashdown (@paddyashdown) June 2, 2015
So sad to hear of Charles Kennedy's passing. He proved to be right on Iraq. History will be as kind to him as he was to others. A great loss— John Prescott (@johnprescott) June 2, 2015
But perhaps the tweet that really sums it all up is this one from Phil Lucas who wrote to him in 2004 with a rather odd question...
Years ago I wrote to Charles Kennedy & asked him who his favourite muppet was. I've just found his reply. A lovely man pic.twitter.com/jxahBmnJ— Phil Lucas (@PhilLucas) July 19, 2012
Politicians are busy people - after all running the country is a pretty demanding job - yet he still found time to pen this pretty superb letter.
"Dear Mr Lucas," Kennedy writes on House of Commons headed paper.
"Thank you for you kind letter of support and question regarding the Muppets. I am very sorry about the delay in replying.
"In response to your question I would like to say that my favourite Muppet is Gonzo. Even though he is blue he is a nice guy.
He adds: "Thanks once again for you letter and best wishes."
Bravo Mr Kennedy, bravo...