I have a colleague who annoys the bejaysus out of me. A list:

Most annoying droning whining nasal voice

She loves the sound of said voice and so witters on endlessly

She starts questions in the middle, the speaks to you like an idiot as you try and formulate an actual question out of the gibberish and catch up to what she's saying.

She worked for her (solicitor) mum and so considers herself a legal expert despite having no training or qualifications whatsoever.

She think she knows better than everyone about everything. Cue absolutely cringeworthy conversation between her and my boss (famous musician) about how studio equipment works.

She whistles through her teeth. Constantly.

She knows nothing about what I do yet constantly informs me how I could be doing my job better. Yet when she covered for my annual leave she was absolutely horrible at my job.

She's overtly sexual/desperate and flirts with anything with a pulse. At work. In the office.

I on the other hand am an absolute joy to work with ; )

*and breathe*