Q An A-Hole: WHY DON'T I HAVE A PASSION IN LIFE?
I suppose I need to embrace the spirit of this section of my blog if I'm going to answer this one.
You didn't leave any identifiable characteristics in your question, so I'm going to be blunt. It's entirely possible that you don't have a passion because you're in your twenties, aren't that far removed from living with your folks, and haven't tried anything yet.
I didn't know I liked playing poker until I fell into a group of friends that played poker. I didn't have a clue that I liked karaoke until I got up and tried it. I had no idea that I would like making videos until I ended up on a team of folks who made videos as an experiment. Now it's my job, and I'm remodeling my studio so I can do video in there as well.
My point is, passions don't just present themselves at your door, knock three times and say "Hi. Steve? Yeah...I'm your Passion? They sent me from Central Passion Control. We're stuck together, so if you could just turn around and drop trou, I'll get up there as soon as...what do you mean is there a shorter route to your brain? Let me check my notes. Uh....not in your case. Let's go, pumpkin."
Get out and Do Shit, try as much as possible, and you'll figure it out. Really.