Honestly? I suppose I just think skin on its own is much more beautiful. I've known a few people quite well with a lot of tattoos and they all had issues and were pretty unstable, lived chaotic lives and used the tattoos as a way of making up for a lack within themselves. Either that or they are not very bright and just act impulsively or felt they needed tattoos to portray a certain kind of persona. I know not everyone who has tattoos is like that but those I've known with a lot of ink are.
One or two discreet tattoos I probably wouldn't relate to such deficiencies and ultimately it is up to other people what they do to themselves my opinion is just that, my opinion which I keep to myself unless specifically asked as I have been now.
I think some of the work of the tattoo artists is impressive but not as a permeant mark on your skin and to be honest most tattoos are not impressive at all. I've seen too many "Only God can Judge Me" or "Justify Your Existence" in large black gothic script to think there is anything special or deep about the people they adorn.
I think no tattoos is classier, more beautiful, natural and more wholesome appearing. Sure people can express themselves with fashions, hair colours and styles, make up and so on but all of that is transient and can change back to natural if they want. Tattoos, cosmetic surgery and the like are all pretty much permanent.
So I don't like them but if you do it doesn't matter what I think.