Two years into my PhD, I am troubled by a situation that made me having to decide on whether to focus mainly on my supervisor's assigned project or my own project as part of my thesis.
The story begins like this. My supervisor promised me a PhD project at the beginning of my PhD to attract me to join his lab (I have my own PhD studentship with all funding attached at that point). But after I joined the lab, I found out that the project is never meant to be done as no one in our lab works in that area or possess the technique.
He then assigned me a few projects that come to the lab from collaborators. The projects did not pan out well due to miscommunications with the collaborators that involve multiple parties, and I begin to lose interest in them to the point that I just want to get them over with. When the assigned projects get stuck in limbo, I started to work on my own project, as I really want to finish my PhD. Doing my own project is difficult as the project involves some knowledge that falls outside the expertise of my supervisor, but I persevere and the project starts to take shape. I am fairly confident that I can get a publication out of it and should be able to write my thesis with it.
My supervisor is unhappy about this, but he lets me do my work as he was occupied with other matters. Recently my supervisor told me that he expects me to treat those assigned projects as my PhD project and to include them in my thesis. I am happy to work on those projects as my side projects, but I want to focus mainly on my own project as it is beginning to take shape. However my supervisor wishes me to work mainly on those assigned projects, and he made it clear that he is not interested with my own project.
My impression is that a PhD student should be able to determine what projects to work on and to include in the thesis. Obviously I am happy to do some side projects to keep my supervisor happy, but I am hoping that I should be able to decide what I want to work on without offending my supervisor.
Any opinion and advice is much appreciated.