First of all, the first consideration should be what my brother likes at ordinary times, such as comics. Animation? Exercise? Music? Network? You should know this question best. Therefore, it is very easy to choose a gift according to this, so the gift selected must be something that my brother likes.
Secondly, you can also choose gifts according to your brother's age! I don't know how old your brother is Give him some fun gifts when he is younger. When I am old, I have my own views and ideas. He can give some common gifts for boys, such as wallets. Brother and sister should be close, and there is no need to have too much scruples about the choice of gifts.
Your brother will understand, I hope my answer can help you! ^_^