Your own perception of your game is always going to be skewed because you have spent a lot of time creating it, playtesting it, and thinking about its mechanics by the time it is done. That could work both ways, either making the game fun for you but not anybody else because an understanding of obtuse details is absolutely vital to getting anything out of the game, or making the game unfun for you simply because you have spent so. much. time. with it that it has worn out its welcome.
Always get outsider perspectives.