I think some of it is our personality and spiritual gifts.

I have a friend who would tell a rock about Jesus. I have trouble even talking to people i dont know about anything ..

The hardest part for me is "religion," or church. In some ways i like it, but i find myself not wanting to partake in religious activities often. I would be a good hermit lol.

I love deep theological conversations though, and hard questions. I am one to say " I dont know the answer" ... I think christians sometimes get in trouble by thinking they have to have the answers. There are some questions i don't see a good answer for ... and thats ok.