Congratulations on your milestone!
I want to mention two people for this as they have both been very influential in my participation:
@jamethiel: She told me about Steemit and encouraged me to signup. I wouldn't be on here without her.
@detlev: His beer contest is what got me participating in things besides just putting my own posts up. Through him I have found other things to participate in.
Those are awesome picks, a lot of cool posts coming from both. I'm going to go with @jamethiel for the SBI share since she is mentioned first.