I've been labeled insanely happy by my co-workers. I think they think that I have a smiling/laughing disorder. I think they're confused when they gave me work, and I chortle and do it immediately. Is this the sign of an mentally unstable person?

Oh yeah, I've been confirmed into the company now. W00t w00t!. I'm now a permanent staff and get the benefits of having to work long hours and weekends! And the thing is, if it doesn't clash with anything that I have planned (like warhammer 40k, MAAO meets, movies, gaming time, etc.), I actually like it :D