After deliberation, he decided to choose Reality. In some ways, he had access to all these other powers or concepts but in a limited manner, for example his Ouroboros bloodline control over time, he had enough evidence to suggest that he would soon uncover that aspect of his bloodline as long as he continued getting stronger.
Power? Absolute Body was all about endless power. Life? Killing him would get so difficult in the near future it would be near impossible, life would serve those closer to him, and for now, he had none, or he allowed himself to have none.
The usage of control over reality coincided with his Soul Points ability, as it was able to create anything, but that power for now was very limited in its application, he could do so much more with control over reality, and it was the best method for him to stay alive at this earlier period in time.