Although I may not have Asperger's, despite one 8 year old son having it, and another younger 6 year old son having Autism and ADHD, I eventually learned from growing up in a very traumatic home environment to not feel too much for highs and to not feel too low for lows. To do so would create too much constant daily extremes of emotion in me, which would make me even for vulnerable to our parents' wrath, as our parents created too much situations daily whereby we were taught to not to feel and to not express feelings. If we got too happy, a fight between them soon could break out and stop happiness in its tracks. If we got too sad daily, my body would say I would die as it was a very depressing home life, as we could not talk because of severe fears, low self esteem lack of trust, and because of no social skills, and as our parents were clueless how to act, behave and show care and concern for us. I saw no end, so I shut down in ways.
This meant holidays after age ten or so were not really enjoyed, but seemed like another day of the week. Why get happy if a mother could threaten suicide on a holiday, just before or after, or if our father was drunk and more desiring of his beer at those times? Years and years of ruined holidays growing up meant reconditioning my mind not to enjoy future happy times and holidays. But, it also meant after age fourteen or so, I slowly year by year without thought but naturally conditioned myself to not fret as much over small or big things, the more I became criticized, or rejected. My body was telling me if you keep worrying too much about what others think, you will have a nervous breakdown. So, I repressed those and other negative feelings like anger, disappointment, etc. too.
So, although in one way it is a constant mild depression for me to lose interest in things, the fact I do not get too bothered by things and am more positive in life, that seems to contradict the depression. It's as if my personality is just more calm or subdued, with me enjoying life at lesser levels, and having some unhappiness, but at lesser levels felt and shown too, but for the most part being content. My case may be different from yours, as we have different conditions, but I just think regardless of condition persons can have their personalities change some by environmental factors. In my case, I never needed to take drugs for any lack of much happiness, or less energy, as I learned to live with that, and as I prioritize my energy only for those most needed things.
Regarding the boredom, yes I bet bored lots. My mind needs to especially keep active. For me its an ocd thing. For others it could be adhd related, Aspergers or Autism related, high intelligence related, or some other condition or reason.