This is a stylistic question that I think depends on the overall shape/effect of the piece and what you want to achieve. It raises interesting issues in terms of overall impression you give a reader. The language, the layout, the kinds of typology, fonts, subheadings, the tone or way you may or may not echo different kinds of writing – range can be vast, from essay, chapter, article, breezy reflexive summary or policy report, government regulation documentation, legal opinion, scientific prospectus, conventions of the dissertation (several formulaic kinds including lit review chapter or not etc) and all through the varieties of literary expression or models – diary, letters, mix of all of these. It is even important in publishing – not for you just yet obviously, but maybe of interest soon – to consider the type of binding, cover endorsements, size of name/title on spine etc – all these things are factors when someone picks up a book in a shop. Then there is the whole other question of how it looks online, on kindle etc.
But on this, the decision is totally yours – which option looks best to you. Usually go with gut instinct on this. I have no personal preference. Sometimes I write to numbers, sometimes as stream of consciousness… as above. Thing is to leave time to indulge such considerations, and kill all typos.