Well...I have three and chose things that I really cared about for my ink. I'm EXTREMELY picky though, and it's taken me like 5 years to just get these three.
First I have "
Don't Panic" on my left wrist, for both Hitchhikers Guide to the Galaxy and my anxiety issues.
Then I have
February 27, 2013 on my right arm, because that's the day I sat at my grandmother's bed side as she passed away.
THEN I have an orange ribbon, for self harm and mental illness awareness.
My advice is choose something that is meaningful, OR get something really pretty like flowers or a sugar skull or something. Because, Sugar Skull tats are SUPER FREAKING HOT. c: