Would it be possible to make a few apps on the side, see if they get any traction and then decide whether or not to jump? You could try taking a month off (without resigning) just to work full time on this. This way you could figure out if you're passionate about mobile apps without actually giving up your job.
I have a line of Android apps that have a few thousand downloads. So far I've made about $30 in half a year with ads. But I'm positive that it would be a different story if I could dedicate myself to that full time.
