I was wondering what people find the most annoying thing(s) when they are playing a competetive match. Whether it's an individual club match, or a team event.
I'll kick off with a starter for 10: 'Talkers/Whisperers'
So many times I have been deep in concentration (well trying at least) when I become more aware of the talking / whispering around me and find it difficult to concentrate. A quick "Sshhhh!" tends to quieten things down only for about 1-2 minutes before it starts up again.
Of course there are different types of talker:
1. Those who wish to have a full blown post-game anaylsis with their opponent as soon as they finish their game, regardless of how many other games are still on the go.
2. General talkers (who are actually chess players themselves, so should know better), who seem oblivious to the fact that people are trying to concentrate.
3. Spectators of your match who 'whisper' to someone standing next to them about how you could win, if only you played this, or black should play that, seemingly not realising that you are only actually 2-3 feet further away, and can clearly hear what they are saying!
There are more, but I'll stop there, as I can feel my blood pressure rising.

Is there something that annoys you as much as this?