Could be part of the reason. All of the games are tied to a storyline for the most part. You could have done without 1 and been ok. It gets repetative without a doubt and by not knowing what is going on does hinder the "want to" to play.
Playing this game only, you have missed 3 other stories/generations of a family tied to a lineage of Assassins. No big spoilers but it could help explain why you aren't into it as much
This post was edited on 12/12 at 8:13 pm