The use of the first person may imply that little –if any- research has been carried out and that no other viewpoint but the writer’s is presented. The use of the first person may also involve writing that is less objective and favours emotions and self-centred experiences.
These days most academics tend to be more flexible about the use of the first person. However, you should check with your instructors what they prefer as there are no hard and fast rules about it. In fact, the use/absence of the first person depends to a certain extent on your field of studies and your Faculty’s position about it.
In fact, the author’s presence in understood in the text and stepping back will allow the text speak for itself. Academic writing that uses the first person insistently turns out to be repetitive and implies a too limited approach to an issue, whereas a wider scope of research is key in academic writing.
As a general rule, do not overuse the first person. Try to use passive forms and other neutral structures in the language that will focus on the achievement rather than on the actor of the action, that’s you. Overusing the first person pronoun might give a too personal, even conversational touch, to your writing that could lead the reader to think you have not done any research and your writing is not very academic.