It's weird and I lose my concentration all the time and I find suspension of disbelief really hard. Plus the actual name itself starts to look really strange written down, and lose its form, like it's written in a foreign language.
This is ok as I have a relatively rarely used name, but I was wondering how you cope if your name is Kate or Emma or a name that crops up frequently in fiction. It must be horrible. (Or maybe I just have massively inflated sense of self-importance.)