Getting your ears pierced is fine and if you're worried about safety then get it done in a respected jewellers. As for nose piercings I catch too many colds to find that appealing
I do think tatoos look a bit common. If they're visible it's just plain bad and if they're not then people should really think carefully anyway. I mean it is kinda like when you were in school and drew a picture on the back of your hand (or was that just me?
) but this time you can't take it off. Ever. Well not without major discofort and expense.
Obviously the most common mistake is to get one that celebrates a significant event or person, because if those happy memories turn sour you have a rather painful reminder of it/them.
There's also the fact that it is quite a major issue with some people. I know a lot of women who if they were getting to know a guy for example and then found out they have a tattoo all over their back, they would be a little held back with them.
Especially if that tattoo featured an ex-girlfriends name!