Let your career goals and personal interests drive your professional development.
Formal Project Manager Certification and training should only be 10% of your development efforts.
The remaining 90% would occur through relationship (e.g. mentoring) and experiential (e.g. hands-on work) learning.
If you have a particular interest in a specific topic (e.g. program management, agile, risk management) then, do some formal training to learn the basics, but then get out there and apply what you've learned.
All the best!