I work in Insurance and find a lot of satisfaction in assisting people in their endeavor to prevent hardship to themselves and family should an unexpected event befall them.
I work on an investigation/claims validation team and it's the most interesting job I've had so far. before that, I did total loss and theft claims.
I personally feel that sales or customer service would be boring, but some people really enjoy it - my missus works in personal injury claims in my office - that also seems quite interesting to me.