Warren Buffett has become very rich in part because he appreciates the value of goodwill to a business while others ignore it. Here's a summary of what he's written on the topic:
To a business, goodwill is an asset just as real as cash or vehicles. In fact it is often more valuable than fixed assets because it appreciates over time while the latter depreciates. Despite this, it doesn't appear on the traditional Profit and Loss statement so is overlooked by managers whose compensation is based on such an inadequate measure of profit.