In my opinion, I would consider your long-term goals. If your plan is to build a brand around yourself and become established as a major influencer, it certainly makes more sense to go that route. On the flip side, your low hanging fruit is to build a brand around the concept by which you intend to cover. For example, Start With Why became a household name and Simon Sinek has built an entire company around that premise. It comes down to what aligns and resonates with you and what you intend to accomplish. Hope this is helpful, all the best!