You have to like your own company, as most of the work is on your own and therefore isolated, private and confidential. But I also undertake undercover work. I originally training in drama and find it easy to slip into a new accent or character. You need to be able to blend in well and you need a retentive memory for speech, writing and the visual. I love the variation.
Nothing's the same.
Even undertaking similar cases is completely different. Although the methodology is the same but the information you are uncovering is different. This is not a very sociable job, definitely not nine to five - you have to work evenings and weekends at times. It can be very stressful and very emotional. You need to be able to stay personally detached from what you're investigating.