Doesn't sound like ADHD tbh. You are absolutely right about the some of the time/more of the time distinction. I'm not sure a list would help - i think you would come up against the same problem, with some of the descriptions 'fitting' and some not. Does your DD have an understanding of other people's feelings and ideas? Children on the Autistic Spectrum often have real problems with seeing other people's point of view. Another common problem is struggling with a social conversation - does your DD ask you about your feelings? experiences? Does she start a chatting spontaneously with you? Is this comfortable or does it feel like a struggle?
One of the problems with all the literature out there is that because its mostly boys/men who are diagnosed, most of the descriptions and even the diagnostic criteria are 'male' (imo). Services are still not great at recognising when girls have problems and i think a lot of girls remain undiagnosed (which may or may not be a problem, depends on all sorts of factors and people's perspectives) And the eye contact thing is a myth - yes, lots of children have problems with it, but not all (well, not obviously).
Would you feel comfortable having a chat with your daughters teacher? If so it might be worth explaining your concerns and ask them in turn to have a quiet chat with everyone at school who knows your daughter well and see if anyone has any worries about her (especially socially)
BTW, nothing you say makes me think 'oh yes, she definitly has an autistic spectrum disorder', its just if you have an instinct that something is not 'right', then that probably carries more weight than a brief once over by GP, if that makes sense.
Sorry, not very well written and a bit waffly. Sleep deprivation and hang over!! Hope that helps.