The meaningful work and the meaningful relationships are, to me, comparable rewards. I think being on a mission to do something great is great, and to be on that mission with people who you have really meaningful relationships with not only provides both types of rewards, but it's mutually supportive. Because you can have tough love, but there's also the love part of that in terms of the caring for each other, and when you have the caring you can be tougher on each other. Some people describe it as an intellectual Navy Seals.