Questions & Answers about Prefiro este formato.
Portuguese often leaves out the subject pronoun when the verb already makes the subject clear.
Prefiro already means I prefer, so Prefiro este formato is completely natural.
You can still say Eu prefiro este formato, but that usually adds emphasis, contrast, or clarity, for example:
- Eu prefiro este formato, mas ela não.
- Eu prefiro este, não aquele.
So the version without eu is normal and very common.
Prefiro is the 1st person singular present indicative of the verb preferir.
That means it is the form used for I prefer.
It can express:
- a general preference: Prefiro café sem açúcar.
- a current choice: Prefiro este formato.
So it works a lot like English present simple in this kind of sentence.