I really only started FPSs in the last few years. I was totally an RTS guys before that. However, I've had my fair share of experience in FPSs by now... including, CSS, BF2, BF1942, Battlefront 2, F.E.A.R., CoD2... the list goes on.
The only team I've been on was a sad event. I was asked to join after they saw my "skill" and we played 2 games in the CSS open CAL. Unfortunately were disqualified each time because of other members of the team. I left, of course, and they haven't played since. =\ However, after the experience, I'm really looking forward to playing on another team.
I don't have any huge testimony, happily I since I can remember I have always been a Christian. My parents and actually whole family are strong Christians. I wish I had more of one, but, I am happy to have never been without Him.