I hear all the benefits of cloud computing and of a hybrid cloud strategy. Are there specific business areas that had the fastest results? Which can provide me the quickest ROI.....working with legacy apps or new cloud native apps?

Omni-channel and Customer-facing initiatives (Sales, Marketing, Service) get broader LoB and CFO support. CMOs drive those to be competitive and to be first to market with innovation. In terms of faster project completion and quick ROI, better to go with Cloud Native apps as they are less disruptive, and limited dependencies on legacy backend systems. Cloud Native apps fall into 'fast speed IT' category, while the legacy apps modernization falls into 'slow speed IT' and involve more resources (time, cost, skills/people)