I was a member until recently of an LLC formed between myself and 6 others.
I was also the registered agent.
The LLC was the lease holder for some hunting property.
The registered agent is not a big deal. It just needs to be a responsible person that is willing to be the point of contact for any legal matters that may arise. That could be if the tax man has a question, or if someone files a lawsuit against the LLC, the RA will be the person expected to accept the papers and be responsible enough to act on it appropriately. If you are your own agent and something does arise, you need to be sure your response is correct. If it is something legal that you are unsure of then at that time contact your attorney or look to get one. For a large corporation you can see where this is needed, letters addressed to the CEO might get missed or delayed in being responded to, whereas if the RA is a designated Law Firm, or the corporations own lead attorney it is much easier to be sure it is handled appropriately.