well i'm certain i have no problems with spatial thinking because i got rated very good at that on an IQ test i took some time ago (i got around 130 overall)
Yeah spatial is my strength too. With those kinds of handwriting problems, if spatial isn't a problem then it's often either a specific motor skill/control problem, lax joints or Dyspraxia (both common with AS).
and one of my hobbies is making houses out of paper which sounds much simpler than it seems, but you have to imagine and calculate all the houses' walls' dimensions and angles and transform them into twodimensional images on paper which you then cut out and fold into the right shapes.
Cool hobby 
I have too little control over my fingers and hands to do stuff like that properly, I have weird sort of bendy joints in my fingers. They don't bend backwards too much but sideways (twist).
i saw on the wikipedia article that people with NLD are bad at remembering images, i think i'm average at that, but i do have problems remembering some names of objects, people and places.
Yeah, I mean I am not good at holding images in my mind (really, really abysmal short-term memory/focus), and I have a lot of trouble actually making my eyes/brain SEE rather than just look, so my perception is more spatial in that sense. When I think of a room I am familiar with, I can sort of feel the shapes of the objects and the texture of them, with occasional glimpses of visual details.
i also can't see why a person with aspergers couldn't have a slight speech disability, if it would be a 1 in a million chance there would still be 6000 people like me in the world

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Well if the writing problem is due to Dyspraxia (with or without AS) then speech can also be affected.
sometimes i remember something good to say, but the conversation has already passed on to another topic
Story of my life - I do have a bit of delay in processing receptive language (in that, a lot of the time, when someone talks to me the words don't make sense, and it takes a couple of seconds for the meaning to drop into place. Sometimes I can be asked a question by someone, especially if I am not familiar with their voice, and it's not that I don't comprehend what they say, I can't even make out the words. It can be hours before my brain suddenly "translates").
So a lot of the time I first have to wait for my brain to decypher the words, then I have to see if I comprehend the meaning, have any opinions on the subject and so on. By the time I realise I have something interesting to say on the subject, the conversation has long moved on.
Mind you, most of the time I am not an active part in conversation, but just sort of listen into other peoples' conversations.