Tim Armstrongis my favourite CEO. I can’t think of anyone else who has provided me with such rich and varied copy over the years. Since he took over at AOL in 2009 he has got into assorted scrapes, taken off his shoes, put his foot in his mouth, lost his rag, offended mothers, fired someone in public, thrown his weight around, talked a blue streak of guff — while at the same time making more money for shareholders at every turn.

Last week, when he agreed to sell AOL for $4.4bn, a Forbes contributor called him a “genius”, arguing that the main reason Verizon wanted to buy the company was to get exposure to the brilliance of its CEO. Mr Armstrong’s bank manager presumably agrees: the man’s personal gain from the deal is put by the Wall Street Journal at $180m. Yet as Forbes was cheering, others were making ruder noises. A blogger on Gawker was writing a post called “A Salute to AOL’s Tim Armstrong, a Real Shitty Boss”.

Many times I have tried to interview this corporate hero/villain in the hope of understanding how one of the least-appealing figures in corporate life could have done so well, but his zealous PRs have come between us. Instead I have had to content myself with listening to him talk, looking at photos and videos, reading his memos and talking to people who have worked for him.