Yep, I have my license and am a very active investor.
If YES,
1. I'm a broker.
2. In Michigan you can be an Associate Broker for a different Principal, and be a Principal of your own firm. I'm both. I do all my deals under a different broker for various reasons, and still maintain my own brokerage.
3. I really see no cons with being an agent/broker and investor. There is only upside, if you properly disclose that you're licensed.
4. Since I'm a very active agent and investor, the time is split rather well. Back when I was doing a lot of flips, the agent side of me helped keep that side of my business going strong. Now that the flips have slowed down, I've leaned more toward the agent work and let the rentals continue to produce the cash flow.
5. Never once have I lost a deal with having to disclose I'm an agent.
6. There was not much to negotiate with the Principal broker of the company I'm an agent under. The deal was already fair as it was presented. Things have worked out well ever since.
Most investors who are also agents will confirm that being both has helped them far more significantly than those who are not both. Of course there are the exceptions to this. Being a person who likes to have control over finding my deals, getting them submitted, and presented the way I want, I find having the license to be invaluable in getting my portfolio to where it is now. Plus, you're one step closer to the agents who get the listings to the deals you desire. The relationships built can be invaluable.