My lists are by no means an accurate list of things I've watched because for most part I've forgotten the names of a great deal of titles I've read or watched.
They usually aren't up to date either, especially weekly manga series (in terms of how many chapters I've read)
My scores for both anime and manga are subjective not objective. After all, I am reviewing, and the whole point of a review is to state your opinion of it. My reviewing system may seem inconsistent, and that may be so. I give a score based on my impression of the series at the time of watching and I've watched some series several years ago. For example, I absolutely loved Fate/ Stay Night but if I were to rewatch it I'd be pretty sure I'd be rating it lower.
My score (on "lists") which represents "average" for anime (and manga) is 7 (although it probably should be 5). Hence, I give seemingly "good" scores to mediocre series. I do plan on changing this system and changing my old scores accordingly though. This system does not apply to written reviews.