a tattoo

My dad always told me not to do something that is irreversible. that is, if i ever wished to change something from my past, its still possible. his definition of irreversible things is included: tattoo, piercing (even if u can remove it, its still gonna leave a mark anyway), and few other things that i dont really want to share here. 

so anyway, apart that. i had one piercing, on my belly button, and i love it, and i dont think i'll take it off anytime soon. and now i am thinking of getting a tattoo. i thought about this tattoo for about 3 years now, and i still havent get it done. for this one, i dont want to be impulsive, *like i normally did* i want to think about it properly and come up with a design that will stay on my skin forever. not something i pick form an album, i want a picture that is made for me, one picture that would reflect my personality and somewhat record my youngsters days, one picture that i'll never regret or wanted to remove.

anyone could give me any suggestion or helped me out on this?