I do feel like I sometimes put up an antisocial wall. When I'm at my least neurotic and most self-confident, things like that don't bother me as much, and I start to realize that the "barrier" is often self-imposed. I'm most protective of myself and more a staunch defender of my right to be different when I don't feel balanced or completely confident..
I can relate to this well.
As for the OP, general 'fakeness' bothered me a lot more when I first entered the work force and was struggling with that shift. There was one coworker who drove me crazy, as she was incredibly 'needy' and would whine/complain/vent constantly about her life and her woes, mostly involving her medical problems. She didn't really know the first thing about me, so it's not like we were friends. She was just known over the entire floor as the person who attached herself to anyone and everyone who would listen to her. At first I would listen to her, but I quickly realized all she wanted and all she was seeking was someone to validate her, feel sorry for her, and keep listening to her. She was like a leech. When I stopped giving her the validation and became more blaise about all of it, without giving the responses I knew she was seeking (it was funny...it was like she'd set herself up for a canned response from me, and then when I wouldn't give it to her, I could almost sense her disappointment/confusion), she eventually stopped talking to me and went to the coworkers who were more accommodating.
Also one time in the elevator back then there was another coworker who was always overly cheerful and irritating in that way, and one day she asked, 'How are you today?', and I said, 'Honestly, I'm in a bad mood' (because I didn't want to fake cheeriness for her that day, and with her, you'd pretty much have to fake it to be at her level...I was crabby ;-). I didn't say it in a mean way, I just said it in a matter-of-fact way. Then she said something or other that was cliche, and I think my response probably came across snippily, because she kind of avoided me for a good week or so after that. oops.
I guess I'm starting to think it's not necessary for me to 'fake' my responses. I'm not sure I ever really have, even in the past, but in the past I would never really admit when I wasn't in a great mood. It's not like I gush with emotion, because I don't, but I will be honest and 'real', IF someone asks and I think they truly want to know how I'm *really* doing. If I think they're just asking me as a social nicety and they don't want to know how I'm *really* doing, I'll usually just say, 'I'm ok'. I don't typically detail all of it, even with people I trust -- unless I know they go through very similar things.
There have been a handful of times at work where I've just flat-out told coworkers that I'm mopey, or am having a bad day/week, or whatever, and others on my team are the same way. I haven't ever gotten pestered for this, and even if I did these days, I don't think I'd take it poorly -- I'd just shrug it off and attribute it to them being them, and nothing more than that. So now I tend to just ignore anyone who seems more fake. Maybe 'ignore' is the wrong word. I just don't let their social behaviors bother me. Some people are just like that.
I will ask people what's wrong if they look like they're having a bad day, but I'll only do that with people I have a good feel for, and who I already think I understand pretty well based on past behavior. I've never told someone to 'Cheer up!! Smile!!' -- that just seems rude and seems to diminish the other persons' emotional state and what they might be going through. And I tend to appreciate authenticity anyway -- so if someone actually tells me they aren't doing well, that just seems so real and genuine to me that I want to understand what's going on.
As for emotion in general -- if I show it -- like if I show glee, or I say 'Yay!!!' (haha) -- I truly mean it, and I'm truly feeling that way. I never fake 'Yay's'.
