My older colleague, the prverbial absentminded mathematician. There's a story circulating that he once forgot his wife in Belgrade. Having finished shopping, he just drove home and only remembered when he crossed Danube. Or, when he reported his car stolen, because he drove it to school and walked home - he lived only five blocks away.
He kept a bottle of loza in his locker (which is completely inappropriate - the name is all wrong, many of these couldn't be locked at all), but he'd drink it from a coffee cup, which he held by his chessboard at the farthest seat in the staff room. He did play chess, but solving problems was his passion. At times when Bogdan (the country's champion in composition of assisted checkmate problems) worked there, he had a lot of fun. When they took students to an ekskurzija, they'd just get in their hotel room, probably have a few drinks, turn off the light and play chess without a board.
The regular scene in the long staff room was when Bogdan would stand by the schedule board, dictate the problem to him at the opposite end of the room, and he'd analyse it and try to solve it. „Eh, found a fault in your problem, look, if black plays the rook to ef five...“. „Nope, white then plays the bishop to gee six and fucks his mother“.
This was so much different from the chess they played in 13., where one expected they'd hand out black belts by the end of semester.