hi Dlim, Im not in ur field but surely regardless ur title depends on what research YOU want to do and are being funded to do? the only way to find this is to read the literature now, find out what is lacking, see if you want to work on that, if you have valuable, novel ideas etc and discuss these with supervisors to determine the feasability of the project...if its all good go for it, your job will come from it in the end, you cant envisiage what job opportunities are available now for 3+ years time so dont let that hold you back