My husband has always told me that I "walk funny". I know part of it is that I'm a little off-balance but I don't know what the rest of it is. My facial expressions aways get me into trouble too - a lot of the time I look irritated or angry even though I'm not. I guess a mirror might help with that. I tend to not notice people too, or even if I do notice them I don't look at them or talk to them unless they say something to me first... that's something for me to work on because I don't want to come across as a snob or anything like that. It's mostly just a matter of consciously reminding myself about that.
I've noticed for some aspies hand/arm positioning and movements can make them look pretty weird when they're walking. I have an aspie coworker who doesn't swing her arms when she's walking, they stay still at her sides. I always knew something didn't look right but it took me two years before I suddenly realized what it was. Also, my dad (a bit aspie) swings his arms normally but he holds his hands stiff, fingers straight instead of relaxed when he's walking. Awhile ago my brother-in-law saw him downtown, from behind a block away. "Is that him?" He looked at the guy's hands and sure enough, it was definitely Dad. Then there's the autistic hand/arm positions and movements that I tend to get myself when I'm tired or overloaded...
Just a couple of days ago my husband was talking about a new coworker in the factory where he works. (My husband is really good at describing people and even imitating them.) From everything he said about this guy, he sounds very aspie to me. One of the biggest things the guys in the factory notice is that this guy "walks weird", he just has a really weird presence when he's walking somewhere. Everyone calls him "The Killer" because of that presence he has. According to my husband this guy's upper body (arms etc) doesn't move at all when he's walking, only his legs move. His facial expression looks like he's ready to kill somebody (thus the name), and if you walk past him and say hi he doesn't really make eye contact. He just kinda looks at you out of the corner of his eye and you might get a quick, quiet "Hi", mouth barely moving. They say if you talk to this guy one-on-one though, he's a really nice friendly guy.