Are you a tweeter or Twitter sceptic?

It was five years ago that a 29-year-old Jack Dorsey sent the first, distinctly understated tweet from his new microblogging site. " Just setting up my twttr ", he wrote, perhaps without the knowledge that these words had just heralded a revolution in online communication and global interaction, with more than 200 million users now sending a billion tweets a week. Perhaps unsurprisingly, Twitter may be in line for a multibillion dollar buyout by Facebook or Google . While Twitter is often criticised for its celebration of frivolity – Lady Gaga, Justin Bieber and Britney Spears are the most followed users – its use undeniably extends further than celebrity sycophantism. The 2009 student protests in Iran were dubbed the "Twitter revolution" and tweeters throughout the Middle East have used the site as a tool to co-ordinate the overthrow of despotic regimes. We want to hear your thoughts, in no more than 140 characters, on the site. Are you a frequent tweeter or a Twitter sceptic? What function does it serve in your life and how do you see it being used in the future? Twitter: love it or hate it?