Self-centered:
* Self-absorbed
* Narcissistic
* Egocentric
* Selfish
* Self-indulgent
* Focused on oneself
Personal:
* My story
* My experience
* My perspective
* My journey
* My take
Informal:
* Me, me, me
* It's all about me
* I'm the center of the universe
More specific:
* If you're talking about sharing your own interests: My passions, What I'm into, My hobbies
* If you're talking about personal growth: My development, My journey, My transformation
The best synonym for you will depend on the specific situation and the tone you're going for.