Some plants will generally grow, and may flower better, if repotted each year. Others can be damaged if the roots are disturbed, and should not be repotted very often.
Knowing what to pot up and when to pot it, is all tied into having a good knowledge of the plants you are growing. There are tens of thousands of different plants in cultivation, and they all need to be treated differently. Our ebooks and courses can help; but information needs to be backed up with experience as well. Never stop reading and studying, so your knowledge keeps building; but always keep practicing and experimenting, so your experience makes the knowledge relevant.