For me, because it's a pain in the ass. I'll call customer service at a company that I'm doing business with (of course, you get this with every company, but it's a little more important to know the name when you're doing business).
Easy: Hi, My name's Joe? Hi, Joe.
Not easy: Hi, My name's Tamala. Hi, Pamela. No, Tamala. How do you spell it. Cell phone crackles. Oh, OK. (Not knowing what she said or who I'm dealing with).
That's one of the easy ones. One of the ones with the crazy spelling - they must go through the same crap all day long!