You need to have a reason to get one and it has to mean something to you.I like the look of some tattoos, but I fail to see why I should waste hundreds of dollars on a permanent, time-consuming process that I might end up not liking the results of and that costs just as much, if not more, to remove.
I'd just get some permanent markers and ink and some stencils if I wanted something, and leave my poor skin alone. I deal with enough needles as it is.
If someone wants to get one, then that's their decision, but it is neither cheap nor fast, and the results are forever unless you want to spend just as much money as you did getting it in order to remove it. It is not a trivial fashion statement.
Otherwise yes you will regret it and it will be a waste of money.