Are you asking about the best order in which to do your clerkships? I assume you have the same basic 3rd year Cores to do that everyone else does. There are heaps of threads on this very topic, a search will yield them for you.
In a nutshell, most will recommend you don't do your favored rotation first or last - too early you risk looking "green" (and not impressing faculty), too late you may find out you don't like it after all. I did my OB-Gyn, IM, Gen Surg, Peds and FP. This order worked well for me - gave me some OR experience and general medicine under my belt before starting on Surg (which I assumed I'd HATE).