I have recently joined CES as a PhD student and have not decided as to what I would work on. But generally I am very fond of observing animals so definitely I would work on behaviour, taking physiology or neuronal mechanism into account to explain behaviour. As to what model system I'll choose I still have no clue. Currently I am just going with the flow of course work and enjoying my days at IISc. As soon as I find an interesting question to work on I'll update you all.