To clarify, doing what you love doesn’t mean you love every single aspect of a profession. Every job has drudgery. When I say doing what you love, I mean you wake up in the morning looking forward to going to do whatever it is you do to provide for yourself [and your family]. And you feel that way 9 days out of 10.
Back to the cost then. It’s simply this: when you do what you love, it can often lead to being all that you do. It’s what you think about when you wake up, when you’re in the shower, in the moments of peace and quiet, and as you close your eyes at the end of the day.
As far as work is concerned, that’s not a bad thing. But you have to realize that other areas of your life will pay the cost. There may be hobbies like woodworking, gardening or cycling that interest you, but you never get around to picking up. There are the missed family events. Or, even worse, you’re present in body only, your mind on the ‘thing you love’.
Chris Bowler - Doing What You Don’t Love.