+Peter: You are the weakest link! Goodbye! Just kidding, don't mean any disrespect to our Cephas.
I've always found the contrast between +Peter and +Paul to be interesting. What quality did this Fisherman have that the Lord picked him above all others as the Rock on which he would build his Church? Why didn't the Lord hurl +Paul from his Horse long before he did and build His Church on Him?
Peter had a brother, Andrew, and owned a boat. It did allow Christ to embark His Church with two oars in the water!
Seriously, I think Peter was simple, the foundation, a powerful man physically. Paul was a scholar of the law and largely made the vital intellectual connections between the old law and new law.
One interesting thing to note about the descriptions in the Gospels, especially after the Last Supper in the Gospel of John, is how much time was spent preparing these men for ministry. That is often overlooked. Jesus knew that He was leaving behing an edifice and trained these men well. Eleven were martyrs.
http://www.ewtn.com/library/THEOLOGY/SPIRCATH.HTM#06