I don't know if I am a sociopath/psychopath but some things seem to indicate it. I also scored quite high on all (serious) tests I did on the Internet. So I will answer these questions.
Easily bored
Yes, I always have to keep myself occupied. I also tire easily of many things. I've quit lots of things I that I have started because they became boring and I found some reason to do so. Also, I sometimes get this feeling when I'm expecting something and not getting it (because of someone else usually) that feels like mind-crushing boredom. It feels basically worse than anything else.
Act strangely or out of character under the influence of alcohol?
Yes. Mostly I reacted like everyone else to alcohol. I became friendly and more easygoing (I think) and so on. But I sometimes also got this "need" to vandalize stuff. I did weird things, like vandalizing public restrooms and also drew graffiti on the walls. And I set fire to stuff and some more things I won't mention.
Easily irritated
Yes. I can go from being completely calm to shouting furiously in less than seconds. I sometimes react instantly with anger and break stuff (even my own things) for minor reasons. I've sometimes done this in public too. I can also (this is not something I like) feel like I really need to kill someone when things don't go my way. Mostly when it is because of someone else. After a fight/argument with someone I cool down quickly most of the time. Other people are still angry but I just think the fight is over, and want to talk about something else.
"Vacation in filth"
I read somewhere that psychopaths need to take a "vacation in filth". I think it was Cleckley who wrote about it. Yes, I have done this in a way. I was leading a somewhat normal life until I broke off contact with everyone I knew. After a while (not 100% intentionally) I started to hang out with low lives, criminals, drug addicts and so on. Did this for...around 1.5 years I think. Not all these people were bad and I became accepted as one of them. I don't really see myself as one of them, but I miss these people and those environments. I sometimes feel that I really want to go back to those kind of environments and that kind of people again.
And a personal thing that I don't know what the hell it's connected to, but I often act weird or "out of character" when I've slept too little. Some of my friends know about this and I use it as an excuse for the rude jokes I make and so on. If I haven't slept in a long time I can become "hyper" in a way, like posting 100s of more or less strange things on the internet, say offhand jokes to people I meet and so on.
So how well do these things coincide with how you are?
PS. I am sorry I haven't answered people who posted in threads I started and I will do so later. I have quite a strong sense of responsibility especially when it comes to things like that.