Whether I get bored easily or not is a complicated question to answer. Ex girlfriends have commented on how annoying my habit of constantly flicking TV channels is - a channel will have been on for 10 minutes, and perhaps even be approaching an exciting reveal, and I'll get a sense of boredom and flick to another channel.
If I don't like a task, I simply can't concentrate on it; for example, when others were revising for final exams I simply stopped drinking and taking drugs, and went jogging (to ensure my mind was working), as I knew I would only be able to get the bare minimum of revision done. I was lucky I was studying a subject that was more understanding than knowledge.
I don't, however, have a problem concentrating on something to which I want to give my attention.
The sort of boredom I want to talk about now though is more of a life existentialist boredom. Sometimes I feel like everything I do is simply a distraction from the banality of life. I feel like I'm doing the same boring shit, and so I do something exciting. I've taken up hang-gliding, rock climbing, and ju-jitsu to name a few of the more transient activities I've taken up; I've even flown a fighter-jet! And then, of course there are the everyday distractions such as going out drinking, clubbing, having sex, going for middle-of-the-night walks with my lockpicks...
Unfortunately, on occasion I get meta-boredom - where I feel like even though the new exciting thing designed to distract and entertain me is still part of the same boring equation: feel life is boring + new thing = temporary respite. That feeling I get knowing I am repeating that same loop again and again is the most boring of feelings of boredom.