Sometimes being able to see them can be really helpful, but more often than not they can get kinda annoying. And some of them don't want to be seen.
But, no matter what anyone else says, they do live among us. I've got three tiny green and blue pixies that live in my dresser drawers at this moment. They're really cute, but as I said, annoying. Most of the Fey Folk I know are more active at night, so I'll be trying to sleep, then little Slipper will start squeeling about something Notes did, and I just want to sleep....... (3 little green and blue pixies names: Slipper <Female>, Notes<Male>, and Zip <Male>)