I have to agree with the personality thing.
I have a six year old daughter that has always been a cuddler, and needs the closeness to thrive. I also have a 2 year old daughter that is just to busy for a cuddle. She may cuddle for 30 seconds and then is on her way, doing her thing. They are both affectionate loving children in their own way. We didnt do the co-sleep thing either.
Another issue might be her age also. At 11 months old there are so many new things to explore, see , touch, smell, ect....
Who can find time to sit still and cuddle. :)
If her behavior seems to be extreme to you, showing no affection or lack of eye contact, share these concerns with your daughters docter at her next well child visit.