I work as a currency volatility trader and manage one of the bigger G10 blocs in London. I've been lucky enough to get responsibility early in my career. I started off managing a single currency book a few months into the job, and have steadily been granted more responsibility to where I am today. It's hard to say definitively what I do any given day, but usually it involves: constantly evaluating our positions (both in the light of my macroeconomic views and RV analysis), making markets for clients, andin the interbank market.
I think the thing I love most about what I do is the satisfaction you receive from getting things right. It's immediate gratification to be able to say each day what your contribution is... which also can make the job psychologically demoralising when you get it wrong; and you will get it wrong from time to time, that's a given.
Happy to answer any questions.