If I was into Tattoos, then the first one I'd get would be about Inter. Tattoos are not rational representation, you don't see people tattooing their mom's or wife's name or whatever, it's just something silly that you like.
Soccer is a bit silly, it's not life or death, yet for me it might be as well. I love inter and I will forever do. I don't love inter as much as my family or whatever, but this kind of silly love is what you want to represent in a tattoo.