<human>: The title says it all really, I can't help but get the gut feeling that people avoid speaking to me or engaging otherwise with me unless they absolutely have to or are required by their job to (customer service and whatnot). I notice it's a bit less with blokes but with women it tends to be the majority, particularly those arund my age demographic. The elderly tend to be pleasant, as are typical blokes you meet while out and about but that seems to be about it.
Now I know I may not be the most smiley, upbeat fella in the world, but I'm concerned this may affect my chances at seeking future employment (interviews, working in a team etc.), as well as just regular interaction with people. 
Granted, I generally bear disdain toward sloppy civilian behaviours and attitudes (I absolutely HATE myself when I catch myself doing things like sleeping in past 0800, failing to deliver on promises, being insincere, so on...) so perhaps they're picking up on this. 
Or perhaps what I think is my neutral expression is really a "I AM THE SCALES OF JUSTICE! CONDUCTOR OF THE CHOIR OF DEATH!!!" face...

And if so, can anyone suggest any means to address this? I'd like to be able to get employed AND meet new people. I want to be amiable and lovable.

Does anyone else feel this way?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: 27y/o Male, thinks he gives off f***-off vibes to people inadvertently, wonders how to change this