I find this a little sad.
When I was at university I would find all sorts of crazy passions/hobbies/interests - building a projection TV from parts, improving my mobile phone signal/look/battery life, figuring out how to get logos and ringtones into my phone for free. The first two turned into hobby businesses that made me drinking money for years and even rent some months, the logos/ringtines got me my first web job.
Years later I was determined to do something interesting with video, and ended up starting an interactive video company with a friend, that to a degree still runs today.
I turned my passion back to mobile phones (as I loved playing with them figuring out what made them fun, and how sites could b great or terrible on mobile) and got a great PO gig as a mobile PO before showing how what we built could run the whole desktop site far better faster and cheaper, and becoming CPO of the company.
Maybe I've been stupidly lucky (I can believe it) but I've always had an interest in the paying work that I do, and usually am able to link it to a passion of mine - either because that is what I set out to do, or because I am well able to find that in the role and the people I work with.
I'm really sorry if you don't have that passion, and/or have only worked with people who are the same. Try doing what you love or at least enjoy - you might like it!
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Edit - and on the payroll comment, I connected with the owner of SimpleTax years ago, and he totally had that passion. As a small business owner he was sick of doing his taxes and set out to make it easy for himself, the tool he made worked well so he dogfooded a basic site in Portugal, and then brought it to the UK where the tax system was similar and the market was bigger. When we met he was so passionate about what he was doing, why he was doing it and what it gave to his customers.