7 month AS/AS relationship here. I'm definitely quite happy with how things are going.
For once I have a boyfriend who I not only don't have to explain my difficulties/awkwardness/problems to, but who understands said traits. My previous boyfriends have all required explanation, and never understood me in quite the right way. Every one of my ex's has tried to "fix" me. Though I didn't learn about AS until I met my current boyfriend; perhaps having that label would have helped my ex's understand me. My boyfriend was diagnosed with Asperger's in high school, and his father is also an aspie (and his mom was recently diagnosed), so the whole family has taught me quite a bit about AS.
I love having someone who values logic and scientific thinking the same way I do, someone who's rational in the same way as myself. It's very comforting. I don't feel confused, my boyfriend says what he means and acts how he feels. I'm not worried about accidentally offending him, because he understands what it's like and knows that I'm not meaning any harm. He's also been a huge help explaining NT customs... I thought I was great at faking, but he was the one who had to teach me how to recognize when someone I'm talking to isn't interested in what I'm saying hahahaha. (I thought the person would either leave the room or tell me to stop talking, he told me that people who are looking away, slouching, saying only things like "uh huh..." etc means boredom. Apparently I bore almost everyone I talk to and never noticed. Whoops.)
It's much less stressful than dating an NT. With my last boyfriend, I always had to be on guard. I had to wear my NT-persona mask 24/7, because he was so intent on fixing me and making me normal, that if I still wasn't normal after all my training he would be angry. He didn't understand that I couldn't just "learn to be normal" and BE normal... I can learn to pretend to be normal, but if I have to pretend all the time, I get really antsy and depressed...
I'm sure I'd have just as good a relationship with an understanding NT, but so far I'm happiest with my AS boyfriend haha.