Personally, I think they're a particularly awesome way of expressing yourself, especially if it's something personal. Tattoos are there forever. So it better be meaningful.
On Sunday, my little brother turned 18 and we had a tattoo party in celebration. My dad, brother, roommate and I all got tattoos that meant something to us.
My brother and I got tattoos for our cousin Gregory who died after having cancer when he was a child. It was an incredibly beautiful moment of us getting our tattoos. Here's some pix!