It is thanksgiving to the Father, memorial of the Son, invocation of the Holy Spirit, communion of the Faithful and eschatological meal of the Kingdom. May God bless you. There are many different roles in the Eucharist. The Christian assemble is made up of bishops, priests and deacons, servers, lectors and eucharistic ministers as well as the rest of the participating faithful. Just as the disciples received a special call from God, so too bishops, priests and deacons receive a special call form God to serve the Church.
Some people have very dramatic conversion stories to tell.
For example, in the April 4th edition of the New York Times Magazine a person by the name of Holloway tells of his call to follow the call of Christ to be a priest. My story is less dramatic. I attended Catholic grammar school and Catholic high school. The good example of priests and seminarians helped me want to become like them. I also had an experience of being close to death, which helped me put my life in perspective.