"What do you like to do?"
Translation:Що ви любите робити?
Is the pronoun necessary? In many conjugated languages the pronoun is unnecessary unless the context is ambigious. How does this work in Ukrainian?
In short, the pronoun is neccessary.
The pronoun can only be dropped when there is some context. Usually when the previous sentence had the same subject. However, when you just have one sentence without prior context, dropping pronoun sounds extremely weird.