I am currently working on my thesis and facing the problem of choosing between "I", "We" or "the author" when I want to talk about things I defined, decided etc. I am the only author of my thesis, but using "I" is not very common, is it? I saw quite a lot of work of single-authors that used "We" when referencing to themselves.
"The author" seems nicer to me, but it is not common?
Any recommendations or remarks?