heres the top 10 according to the Irish times - http://www.irishtimes.com/news/smelly-food-tops-list-of-workplace-annoyance-1.1480583
don't think any of those bother me that much. My number 1 would be the pricks I work with
1) The smell of hot food causes offence; i.e. curries & fish dishes.
2) Taking your shoes off at your desk.
3) When colleagues take your possessions without asking; i.e. mugs and stationary goods.
4) Personal hygiene - not washing hands in the toilets, clipping toe nails or picking noses at desks.
5) Leaving the kitchen facilities in a messy state.
6) When workers bring crying babies into the office.
7) The quick-fire spread of idle office gossip.
8) Use of unnecessary vulgar language.
9) Co-workers skiving and not putting the required effort in.
10) Sending unnecessary emails to colleagues.
don't think any of those bother me that much. My number 1 would be the pricks I work with