Your reasons for not wanting a to get a tottoo are quite similar to mine, especially for the "getting bored" part. I am not sure I am gonna love seeing (or showing off) a particular piece of art on my skin for so long.

And faded tattos aren't nice to see and the pain that comes with it is just not something I will wanna experience. And well, I hate needles.

I still do "design" my skin with my pen, (when I get bored) lol. I guess I still haven't grown up.