i dunno i think my motivation comes from a ton of places. sometimes I do things to impress a girl. Can't say that has anything to do with Autonomy mastery or Purpose...Sometimes I do things out of pure vengence...missed the three again...
Sometimes I do things simply becuase I have nothing better to do - i'm not even sure what to call that...motivation by desire to waste time till I find something I have to do. Randomly browsing the internet is a good example.
I think largely my motivation these days is to accumulate enough money so i can pay for my delicining health when I get old. I have no illusions of an afterlife, and I have never felt a purpose to do anything larger than myself or not.
If fact the biggest motivator in my life seems to be laziness. I tend to maximize my efforts in ways that allow me to do neccessary things it the least amount of energy and time and money. In a way it's an avoidance of Autonomy. I don;t want to be responsible for too many thing - I'd give up freedoms for luxuries.
Now mastery...I admit I definitely had a motivation stemming from that desire. But those days died the minute I realized that everything I learn and master will mean nothing when i die. My brains will be mush, my neural pathways gone, and my mastery forever disappeard. And it only gets worse with age after 30. At best you can claim to be a master at soemthing till your 40s - then it's just downhill. Even science guys tell you that you do your best work before 35, before your neurons start degrading from old age. And I dont even have to take about sports. You pretty much have to born as a genius and develop all that skill at a young age then put into practice as an adult. Then you can say you're a master.
I say motivations stem from a lot of desires not just 3. Sometimes they dont have to make sense to us - only to the people who feel them.