Im always curious about the smell of breath

I've come across people with bad breath and some I cant judge. I'm wondering does everyones breath have a smell to it good or bad. I have never noticed before and I don't have a guy to test it on. I ask people I'm close to if mine smells because I'm too conscious and I have always got no's, its funny. is it normal to be panicky about breath. I know certain foods trigger bad breath but my main point here is generally throughout the day or give me experience about someone you know or hang out with.