Let me ask you something, do you have a tattoo? If so, how long did it take you to decide on a) getting one and b) on the design? Guess what? I actually took two whole years to think about my first tattoo, and then I went ahead and got one. And I don't regret that at all.
Why? Here are a few examples that show that when you decide in haste, it's not always a good thing unless you have a great tattoo artist who can rescue a badly done or faded tattoo.