I hate tattoos for aesthetic and intellectual reasons.
The skin isn't a good stage for art, it's not neutral enough in colour and has to act as white in a tattoo, which it can't do effectively. Does it matter if the white in your image is not white? Try it, colour the white area pink or yellow or grey in an image - I guarantee it will look shite.
Aesthetics don't bother a lot of people but tattoos are also a sign of conformity and insecurity. They are always used as either the badge of a group, gang or subculture or a way of proving you mean something - "see I'm earnest enough to get it carved on my skin..." If you are an individual with the confidence of your views you won't feel the need to do that. Nominating yourself for inclusion in a group or gang is also a sign of insecurity. Tattooing 'love' and 'hate' on your knuckles won't make you good at fighting.
Although I hate tattoos a lot of the women I've had have had them. Piercing's too. Unfortunately the kind of women I like tend to like both.