i'm just about to get my nose pierced though.
but my friend is trying to talk me out of it... i'll give her a few more days.
Why you shouldn't:
You will ALWAYS have that hole in your nose, and it will ALWAYS be visible. If you ever decide, "Eh, all fun'd out with my nose piercing" it will still be there, and people will see it. And it'll always look a little weird.
I have lots of classmates with them... It's kinda.. gross.