As I'm not a native speaker and just finishing my dissertation in Computer Science, I wonder what style I should be using. In German (my native tongue) most dissertations, school-books and scientific writing use third person or passive voice to sound 'objective'. I know that passive voice in English should be avoided. In most of my publications I use "we" (e.g. "we can improve the recognition rate by ...").
For the dissertation, as it is my work, should I prefer "I" over "we"? I don't like the idea too much, as it sounds pretentious to me. Currently, I want use first person singular for the contributions section and first person plural for the rest. I try to avoid passive as often as possible. Is this acceptable?