I think on the whole tattoos are a gratuitous display for the vain.
There are exceptions where tattoos can enhance the character & identity of a person, but only really if they already some way exceptional, like a rock star. And by "exceptional" I don't necessarily mean talented or special, just a person who is out of sorts and not defined by rules and conventions most everybody else follows.
If you're not in this exceptional category or don't wish to pertain to being known as exceptional (by definition, you only wear a few tattoos and with no real distinction), you're merely a follower trying to emulate and purvey an image of yourself different to what it really is, similar to certain "individuals" wearing burberry caps and fake designer branded clothing.