I've noticed this about Aspies actually. Generally speaking, painfully generous...often think of others, what they want to do. Generous to a fault sometimes, very caring people
However, you can be selfless and self-centred at the same time. Very few Aspies I know are selfish, but self-centred and self-absorbed yes.
My boyfriend is an example of this. (He's the AS in our AS/NT relationship). He's always giving me things, doing things I want to do, doing things for my pleasure, doing work on my car for me...he's selfless and generous to a fault because he expects nothing back! He's an absolute angel. Makes me look like a typical scummy mere mortal
However, here's where the self-centred part comes in. When we're talking, I'll make a statement and the conversation is automatically seized by him. Eg...
Me: "I'm loving that new suspension in my car, it may be really rough on the backside but turn-in is spectacular..."
Him: "Yeah it's a lot like mine now. I did a run through the Domain today, managed to get around the hairpin without too much fuss. Though I've noticed the rear doesn't harden up as much as it used to..."
...this always happens. I'll start talking about something that might just refer to me once in a while, and immediately the conversation will turn around and focus on him. He uses the word 'I' far too often. Every statement I make immediately relates to him him him...everything he says is about him. You'll notice that when people talk, they take big turns in talking about one another, not always focussing on themselves. The word 'I', along with 'me' and 'my' crops up a LOT on this site...moreso than a lot of other forums I regulate.
Another example of self-centredness despite earth-defying generosity and compassion. We're in the kitchen getting some lunch. My boy goes about grabbing food, not once noticing my presence, let alone offering me anything (since it's usually his kitchen we're in). When he pours himself a glass of drink, he never offers me any. If his mum reminds him to do so, he gets sh***y with her and she usually offers me one instead. He acts as if I don't exist...normally, it's the polite thing to tend to your guests BEFORE yourself, or they will feel like they are not welcome.
So there's the thing...Aspies are generally generous, selfless and compassionate to a fault, yet the social interaction brings in a self-absorbed element. You don't need to give everyone every scrap of what you own and what you can handle, but you do need to interact with them on their level at times to show you actually AREN'T self-absorbed When someone is talking about themselves, humour them for a little and talk about them for a while too - NO references to yourself or something you do/have/etc. When it's time for your turn, they are self-centred if they can't do the same back and talk about you and just you. When people DO talk about exclusively you in a conversation, chances are they're not completely interested (it's far more interesting talking about ourselves, let's face it...it's human nature) they're being nice. But that's not a bad thing...they learn a lot about you and chances are can become closer to you as a friend/partner/whatever