This post is requesting readers to supply an answer to the above question. I am conducting research on the subject and keen to hear from the ‘horses mouth’ what it was that motivated you to pursue fatherhood. I assume a lot of men on this site will have mixed feelings now but if you can focus on what you originally expected from fathering I will eventually juxtapose it with a myriad of research already done on why women have children. Good men project  is one of few sites where you can read what some men think fatherhood, or not, means to them.
Some reasons may be:
Social expectation.
Pleasing your partners wishes.
Achieving Fulfillment for your life.
A further expression of your loving relationship.
An unconscious effort to correct your own unhappy childhood.

Biology of fathers is worth watching for reflection

I thank you in anticipation of some thoughtful replies.