I chose to study Chemistry at university because I enjoyed it at school and liked reading about how things work. After graduating I decided to stay at university and do a PhD because I became interested in complexity, which is how small systems fit together to make big systems. I never thought that I would be a scientist really, I just did what I enjoyed at the time – it turns out that what I enjoyed was science! In many ways I don’t actually think of myself as a “scientist” because there are many other things that I love doing, but I just study science for a living.
However I do know lots of people who always knew that they wanted to become a scientist and in some ways I envy them. Whatever you decide to do in life you should enjoy it I suppose. And if you don’t know what you want to do then don’t worry! In many ways I still don’t know what I want to do, but I’m certainly enjoying myself in the meantime.