Honestly, if you're worried about the other high-end people with their nice houses, don't be. Metal roofs have so many pros compared to other expensive materials for roofs. You also said you have a green metal roof. Does it match anything else on your house? Sometimes to create a better curb appeal, you could paint the front door or sides of windows on the front of your house to make a cohesive matching house. Your neighbors would be jealous of your cute green accented house without costing your a fortune to replace the whole roof. I'd also recommend to get the metal roof inspected as well!