Complex organic molecules in space are commonly associated with the hot inner regions of massive young stellar objects (MYSOs). In the past decade, complex organic molecules have also been identified in many other interstellar environments, which suggests that complex molecule formation pathways exist at a range of temperatures. The nature(s) of these pathways, and whether the same (grain surface) pathways dominate in cold, warm and hot environments, remain unclear, however. These unknowns limit the predictive power of astrochemical models, and the development of complex molecules as environmental and evolutionary probes. We use spatially resolved observations from the Submillimeter Array of three massive young stellar objects (MYSOs), together with a large sample of mostly unresolved complex molecule observations to explore how molecular ratios depend on environmental parameters, especially temperature. The spatial distributions of complex organics toward the three MYSOs are evaluated both qualitatively and quantitatively. We find that CH3CCH and CH3CN have distinct emission peaks, that can be associated with lukewarm (T70 K) and hot (T>100 K) environments, respectively. These trends are also seen when comparing ratios of different complex molecules versus temperature in a diverse sample of complex chemistry hosts; there is a clear chemical evolution with regard to complex chemistry composition from cold to warm to hot sources. We propose that ratios of CH3CCH, CH3CN, CH3OCH3 and CH3CHO over CH3OH together probe the relative importance of cold, and hot complex chemistry in MYSOs, as well as the overall conversion efficiency of simple ices into more complex molecules.