See avatar.
The best advice to follow in my opinion is, "It's not too much until you notice the modifications before you notice the actual person."
It's funny how people against tattoos only have the old argument. Hate to break it to you, but we're all gonna be ugly as fuck when we're ancient, and I know I'm not going to be damn insecure, or give a hoot about anything besides my wrinkled old self.
That's what being young and dumb is for.