I can't say that I like being called 'ma'am'.. I'm still in my twenties, so I feel more like a 'miss' even though I'm a 'mrs'... It's a conundrum. I feel like 'ma'am' is more for my grandmother, an older, respectable woman, than for me. Most people just use it as a sign of respect, I guess, so I shouldn't feel bad about it!