I think the logo of musing is better for our posts as because the platform is giving us the chance to earn something as in the form of steem so we should also support them to give their logo in front of our post so they the users which are not knowing about the site musing will be able to understand the site and try to comes as there will be more users attraction by keeping the musing logo in front of our post.
If you give your own logo then answers will looks like blog so separate platform for blogs is already given we can use the platform and write post and we can use musing platform so solve the users query to solve the problem.
i think there should be no need of using our photos instead of musing logo in our blogs or answers.