My suggestion to you is to get something that means something to you. You may like certian things now, but 20, 30, 50 years down the track even your going to look at yourself in the mirror with the tattoo and think why did i get this? WHY?!?!?
When you get something that has a message or a meaning, youll never regret it, the only thing you can regret about it is where you put it, but never the tattoo, because you will know where it came from.
Thats just my opinion.
Dont rush it, because they are great! Better then peircings and anything else. You dont want somtehing then think, you can get rid of it simply like a peircing. Research, look around, see what you like, see whats nice and whats for you.
Go on to deviantart.com and look in tattoo designs under design and interfaces and youll find loads and loads of tattoo designs.