St. Ignatius was eager to embrace the suffering of a martyr for the sake of Christ, as we see in his letter to the Romans. He is also a champion of the role of the bishop in keeping the Church connected to the Apostles, and of the primacy of Rome as an apostolic see. Finally, Ignatius is the first Christian writer to refer to the Chrch as "Catholic".
His writings can be found in the link below:
Also, see Pope Benedict's wonderful essay on St. Ignatius, given at his general audience in March.
Ad Jesum Per Mariam,