Xanax - more effective if taken daily or just when needed?

[momentary997]

Being someone who is relatively anxious, and having seen the miraculous effect of taking a Xanax before an audition, I wondered whether maybe I should consider taking it regularly. I spoke to my doctor and he said that if I took only .25mg daily that I would definately not become addicted. I am still unsure - my family say that it would be beneficial if I took it daily for when I have an intensely stressful moment they argue that the Xanax will work more efficiently because it is already part of my system.
I can't help but think that the tablet would be more effective if I only took it in bad situations.
I'm also a little freaked about the whole 'personality' change - on the Xanax (the whole three times I've taken it lol) I've been so mellow and nothing worried me. Yet I had taken the Xanax because I was completely freaking out about certain issues. I guess I'm scared that I'm going to alter 'me' by taking Xanax continually...anyone with Xanax experience out there..?