Transitioning from a Project Manager to a Scrum Master - Need inputs

I started my career as a Project Manager in a software development company and now I work as a Scrum Master in it. I would like to know other people's perspectives who have made a similar transition - from a Project Manager to a Scrum Master. 1) What made you change your career path? 2) How did the career change to a Scrum Master's role work out for you? 3) What was/is the most difficult challenge faced by you? 4) What advice can you provide for successfully transitioning to a Scrum Master's role? Thanks.

Posted By - SW