Is it obligatory for me to be equal in helping people and offering assistance to the committed and others, even though I rejoice in gratitude for good deeds? And does this distance me from sincerity?

The best of people are those most beneficial to people, and showing kindness to them carries immense virtue. Part of complete kindness is refraining from harming them, enjoining what is good upon them, and forbidding what is evil. Specifying upright individuals with additional kindness is a praiseworthy act that indicates complete love for them. The Prophet encouraged honoring certain categories of people, such as an elderly Muslim, a bearer of the Qur'an, and a just ruler. Umar ibn al-Khattab used to bring close people of knowledge and virtue, and he held in high esteem the family of the Prophet, the people of Badr, and the early converts. Therefore, one is not blameworthy for honoring people of virtue, being kind to them, and giving them precedence, for he has an example in the Messenger of Allah and the Rightly Guided Caliphs. And if a person receives gratitude for his kindness and rejoices in it, without the praise being his initial intention, then there is nothing wrong with it, for that is the immediate good tidings for the believer. As for the hadith: "All creation are dependents of Allah...", it is weak.