My Megan always wore her harness, except for the days when she got her bath. I got a kitten harness for Gina(only one small enough for her), 9 weeks on Sunday, so she can get used to wearing one. I never let Megan outside alone, and she always felt "naked" without her harness. Her tags were on the harness, and she liked to make them make noise every now and then, otherwise she was as quiet as could be. I'm getting Gina micro-chipped soon, but she will still wear the harness with her tags. I just feel better that way.
Cheers Quad