I'm not a fan of the plastic poker chip markers, but there's nothing wrong with them at all. If that's what you want to use, it has no bearing on my state of mind or play, it's just a marker. I personally prefer, use and collect the large metal ball markers, usually with a removable smaller one in the middle. They're smart looking, easy to see from a distance, and easy to use the smaller one if I'm directly in someone's line.
If there's a marker (especially large one) remotely in my way, I'll ask for it to be moved. I may leave it in place if it's a smaller one I'm using for a line, but then I run the risk of hitting it and pushing myself away from the hole, c'est la vie.