I just have one. It'* the only thing, so far, that meant enough to me to actually get one:
I've been riding bmx for 10 years. Everyone I hang out with now I know somehow from riding. And, the funnest times I've ever had in my life were on my bike.
I know some people look back at their tattoos and think it was a dumb decision to get whatever. I hope I can look back and think about how cool of a period that was in my life and how it impacted me.
If I get another one, it will either have to do with Philly (I love this city) or what counties my Irish ancestors originated from in Ireland.