Hallo there!

Is there any way to see an items votes by each user?not the number of the votes but exactly who users and how vote for an item. Or maybe is there any module or component for this job?

And something last. Is there any component for recommendation system?which will be based on user preferences?

Thank you very much

I am sorry but I am unaware of such an extension.
You can look at the feature list of extensions like com_community and jomsocial