That person I hope I'll never become

I have a fear of becoming an annoying person.

Sometimes I get caught up in what I'm doing and I don't realize how loudly I'm speaking or maybe what I look like that day. My psychologist says I've got ADHD so this isn't really surprising that I don't notice these things, but the tendency scares me. I don't want to become like HER.

There is a woman in my class whose reputation preceded her. I didn't know it was the same person until break on the first day when I was told "Remember that woman I told you about? That's her" by a couple of people. My response was something like, "Ohhh, I'm glad to know there's not two of her in the school."

I started examining the similarities between the two of us and I'm appalled. I'm not sure how to NOT become this woman and it scares me!

1. We are both mothers.
Con: This similarity cannot change.
Pro: I do not continually interrupt class with anecdotes about my kids.

2. We are both fat.
Con: Nursing school has given me two choices: smoke or eat. I'm eating to relieve the stress, so this similarity will continue for the time being.
Pro: I do not wear ill-fitting clothes which flash my cleavage at everyone everyday. At least, not every day. ;)

3. We are both people that other people ask questions of and therefore are considered smart.
Con: We both have a lot of info to share.
Pro: Most of her info is wrong or anecdotal.
I don't share my info unless asked.

4. We both were pretty confident we'd make it into the program.
Con: I was the top test-scorer and I did tell a friend that, only to find out that she was in the program as well. Ooops, I didn't mean to brag.
Pro: My nemesis bragged, "I'm a shoo-in for this program" and then bombed her first test. There's actually a funny story with this. She sat in the front row and calculated everyone's score for them so she could find exactly what everyone else made. I made an 85, a B. I did secretly chuckle when I found out she'd failed.

5. We are both extroverts.
Con: We will both talk to anyone, anytime.
Pro: People see her coming and scatter. I just get a "hey".

I guess so far I'm OK other than finding out I'm a pretty mean person. One day she came to class and found us all sitting in the hallway because the door was locked. She stupidly tried the door anyway and then asked, "Oh, the instructor's not here yet?" and then wandered off, stepping back over several people as she went. I mumbled, "No, we're just sitting around for the hell of it." and made everyone laugh.

Also, the entire class has taken to muttering, sighing, rolling their eyes, slamming books shut, roaring and/or leaving the classroom when this woman starts talking. I have not noticed this with myself yet.
*sigh*
Yet.