For those who are having trouble picking something they love to do, instead of thinking of the job think about it from a non-job perspective. In other words, don't try to label what you love to do with a job title. Do you love chatting and talking with people? Do you love being outdoors? Do you love solving mysteries? Do you love working in solitude?
For example, if you love solving mysteries that might lend itself to private investigator, biology researcher, forensic psychologist, IRS auditor, etc.
Likewise, if you have a list of a bunch of things you like to do but they seem shallow to you, see if you can discern what aspect of these things you love. Maybe it's not the whole job, maybe it's just an aspect of it. Like, "I love photography because I can be out in nature. Oh, and I really like soccer because... oh I get to play outside. And I really love hiking because it's outside. And I love going for long drives because I love watching the sun set." You might find a pattern that suggests you simply want to work outside. Then go from there.
When I did the exercise in my blog entry,
The Path to Purpose, I realized that exploring and sharing what I know about the afterlife and the paranormal is what kept coming up again and again. I realized that with this love I could start a magazine, become a parapsychologist, develop my psychic abilities, start a blog about the paranormal, write fiction stories or write a tv series with a paranormal slant, etc. So many ways to express that love.