Not to invoke a saccharine, dopey or overly-sentimental approach, but I would say that it was probably not so much a matter of me choosing Buddhism, but of Buddhism, via Amida Buddha, choosing me. When I saw the unfolding of the Dharma as described and transmitted via Jodo Shinshu (or "Shin") Buddhism, I knew I had come home, at least in the specific context of the spiritual quest.
Shin tells us that we are "saved", i.e., delivered from the samsaric ego and led to nirvana by Amida Buddha's "Other Power"
alone. We are not to rely on self-power in matters of salvation. In fact, in Shin, it is impossible
to rely on self-power toward the goal of reaching spiritual ultimates, because Amida is
the provocation, the call, the answer, and the giver of true faith or Shinjin; at once the Giver and the Gift.
Yes, Shin does allow us to make self-effort
... in all things but spiritual fulfillment. Therefore, although I expended - and continue to expend - self-effort in my religious studies and other fields, I simply acknowledge that it was Amida's Other Power that drew me toward "Himself", to Shinran, to Jodo Shinshu, and thus to Buddhism