This is and has been one of my greatest struggles in life and ministry. I constantly question my calling and my gifting and yet I can seldom imagine doing anything else. Of course there are elements of ministry that flat-out suck, but I love it... I just don't always feel good at it. I suppose that's the beauty of "calling." It implies sheer passivity on my part right up to the point of response. The calling is not my choice, only whether or not I accept it. I have often expressed hesitation about the word "calling." I realize that it can be abused and exploited as objective justification for subjective decisions. I realize that it is a strong word, but in regards to its' implications regarding my capacity to choose, I think it's appropriate and, at it's best, quite liberating. If I'm called to this, then I've got no business second guessing my gifting. It is just not my job to worry about how good I am at it, it's only my job to do the best with what I've got.
As soon as we begin comparing ourselves to others, we've missed the point. It's not about you. It's not about me. It is and always has been only about Jesus Christ and God's work in the world. The river of God's love is flowing with or without us, we need only to ride the current with courage and passion. As soon as we say, "what about them?" Christ, in love and boldness, responds to us, "what is that to you? Just follow me" (John 21:22).
Feel better? No, me neither. But it's a start.