Crushing on my co-worker

So I've developed a crush on my co-worker...He's in a completely separate department from me so we don't really see each other a lot, but when we do we talk all the time! There's just a natural ease in our conversations. We seem to have a lot in common (same humor, video games, love museums)...my only issue is he's younger than me. I'm 30 he's 26. I'm just wondering has anyone ever dated a coworker and what would you say were like pros and cons