The Great Commission

I have been working on reading The Purpose Driven Life for the last 38 days. The chapters I have gotten to now are about going out into the world to tell them about the gospel. I knew it would come, but I never expected it to hit me so hard. In the book Rick Warren asks you if you want to be a world-class Christian or a worldly Christian. World-class Christians are those who go on missions trips. I have never really felt called to do that, but it says that EVERYONE should do it. I have always felt that I have been put here by God for a purpose and that if I live my life the best I can to His glory that I have done my job. I realize I could get more involved in ministry but I never had intentions of going on a missions trip. Does that make me a bad Christian? It really kinda made me feel crappy yesterday. I have never felt like I had the gift of leadership. I have tried being a youth group assistant and camp councellor and for the most part I just felt kinda awkard and not very effective. In the book Rick Warren also talks about all the people in the Bible that God used who were not necessarily 'gifted' in their area. I just don't know what to think. I didn't think that this part of the book would hit me so hard. I guess I can pray about it, try to find some peace. I think that with the '40 Days of Purpose' coming up at church that maybe it will help to answer some of my questions. Also the small group that Jay and I joined should be helpful too! I am pretty excited about our small group, it's been so long since I was involved in a Bible study! Anyway, that's what's been on my mind lately! Any suggestions? Comments?