I don't have an Apple tattoo but I do have a very small Windows logo tattoo. Which I had intentionally put somewhere, easily covered up and small enough that if I ever had to I could dab some concealer on it.
I got it back in college while I was working on my IT degree and was losing steam with it. The Windows symbol actually had meant something to me. I had been tooling around with computers my entire life and the tattoo served as a reminder of why I was putting myself through the "torturous" working full time and school full time.
Even though I mostly use Apple products, I don't regret it one bit as it has meaning to me personally. I wouldn't just tattoo any logo on myself because I enjoy the product. I mean your tastes can change

You may be an Apple fan now but what if next year you decide you prefer Android and Windows?
To each his own though!