Which is better: not to continue with supererogatory (nafl) prayers that are not Sunnah Rawatib so that they do not resemble Rawatib, or is it better to continue with them?

The question about the ruling on consistently performing an absolute supererogatory prayer (nafl mutlaq) that the Prophet, peace and blessings be upon him, did not consistently perform, has been answered previously. Asking too many questions about absolute supererogatory prayers may fall under the prohibited excessive questioning, as it involves undue rigor (tanattu') and over-elaboration (takalluf). Legitimate questioning is for seeking knowledge in matters of religion that are needed. However, questioning out of obstinacy or over-elaboration is blameworthy.