Arrrrgh drives me f-ing nuts every time a colleague uses it in texts and emails. To her it's a way to express apology i.e.' sorry I'm running late :'( ' but to me it's like fingers down a blackboard - like she's texting "I'm just a little girl not a grown woman and if I use this emoticon you'll forgive me anything and what is more you'll feel guilty if you feel even an ounce annoyance at all that I've f'd up"!!!