Best bets for:

xxxHOLiC

Rating Average: 2.4000
Rating Stddev: 0.8
Review Count: 5
Existing Best Bet #: 2.6
( $rating_average - $rating_stddev ) + ( log($reviews) / log(5) )
( 2.4000 - 0.8 ) + ( 1.6094379124341 / 1.6094379124341 )
( 1.6 ) - 1
Proposed Best Bet #:
( ( $rating_average - ( $rating_stddev / 2) ) - ( ( $stddev==0 and $reviews<5)? .5: 0 ) * $similarity
( ( 2.4000 - 0.4 ) - 0 ) * $similarity
( 2 - 0 ) * $similarity
2 * $similarity
In English: Average rating minus half the standard deviation of the ratings, with a penalty of half a rating point if there are fewer then five reviews with no variation in their ratings.
Discussion: This uses the average rating as the base, lowering the overall rating based on the amount of variance in the ratings. Additionally it lowers the rating if only a few people have rated it and they've all given it the same score. Perhaps shows with few ratings shouldn't even show up in best bets.

Keywords: 16 - 2006, TV, Modern, High School, Occult, Psychics, Slice of Life, Supernatural, Acquired Taste, Dark, Drama, Spiritual, Surreal, Weird, Creepy, Mystery

For reference, Devil Doll's similarity calc is this:
( $matching_keys * ( $matching_keys / $total_keys ) * $total_keys ) / ( $total_keys * $total_keys )
Pool of potential series:
TitleKey MatchRatingRating - stddevDevil Doll's Similarity CalcNew bbetNew bbet * SimilarityOld bbetOld bbet * Similarity
xxxHOLiC Kei 15 3.33 3.10 87% 3.10 2.72 3.54 3.12
xxxHOLiC - Manatsu no Yoru no Yume 15 3.17 2.72 87% 2.72 2.39 3.38 2.97
Ghost Hunt 11 3.25 3.03 47% 3.03 1.43 3.68 1.74
Bleach 9 3.43 2.90 31% 2.90 0.92 3.59 1.14
X (TV) 8 3.75 3.47 25% 3.47 0.87 4.91 1.23
Chaos;Head 8 3.25 3.03 25% 3.03 0.76 3.68 0.92
Rozen Maiden 7 3.75 3.53 19% 3.53 0.68 4.61 0.88
Interlude 7 3.75 3.53 19% 3.53 0.68 4.18 0.80
Higurashi no Naku Koro ni 7 4.00 4.00 19% 3.50 0.67 4.68 0.90
Jigoku Shoujo Futakomori 7 4.00 4.00 19% 3.50 0.67 4.68 0.90
Jigoku Shoujo 7 3.60 3.36 19% 3.36 0.64 4.11 0.79
Boukyaku no Senritsu 8 3.00 2.55 25% 2.55 0.64 3.11 0.78
Speed Grapher 8 3.00 3.00 25% 2.50 0.62 3.68 0.92
Devilman Lady 8 3.00 3.00 25% 2.50 0.62 3.00 0.75
Loveless (TV) 7 3.50 3.25 19% 3.25 0.62 3.43 0.66
Rozen Maiden ~Träumend~ 7 3.33 3.10 19% 3.10 0.59 3.54 0.68
Elfen Lied 7 3.50 3.07 19% 3.07 0.59 4.18 0.80
Kurozuka 9 2.25 1.71 31% 1.71 0.54 2.02 0.64
Shoujo Kakumei Utena 6 3.83 3.65 14% 3.65 0.51 5.26 0.74
BECK 6 3.83 3.65 14% 3.65 0.51 4.57 0.64
Suzumiya Haruhi no Yuutsu 6 3.80 3.60 14% 3.60 0.51 4.83 0.68
Maria-sama ga Miteru ~Haru~ 6 4.00 4.00 14% 3.50 0.49 4.00 0.56
Natsume Yuujinchou Shi 6 4.00 4.00 14% 3.50 0.49 4.00 0.56
Aku no Hana 6 4.00 4.00 14% 3.50 0.49 4.00 0.56
Texhnolyze 7 3.00 2.50 19% 2.50 0.48 2.43 0.47
NHK ni Youkoso! 7 2.83 2.49 19% 2.49 0.48 3.26 0.62
Kanon (2006) 6 3.60 3.36 14% 3.36 0.47 4.11 0.58
Rahxephon 6 3.55 3.30 14% 3.30 0.46 4.54 0.64
Koi Kaze 6 3.67 3.29 14% 3.29 0.46 4.03 0.57
Asatte no Houkou 6 3.50 3.25 14% 3.25 0.46 3.86 0.54
Dai Mahou Touge 6 3.50 3.25 14% 3.25 0.46 3.43 0.48
Kareshi Kanojo no Jijoo 6 3.50 3.14 14% 3.14 0.44 4.70 0.66
Nazo no Kanojo X: Nazo no Natsu Matsuri 6 3.33 3.10 14% 3.10 0.44 3.54 0.50
Monster 6 3.50 3.07 14% 3.07 0.43 3.50 0.49
Teizokurei DAYDREAM 7 2.50 2.25 19% 2.25 0.43 2.43 0.47
sola 6 3.40 3.00 14% 3.00 0.42 3.60 0.51
Yakitate!! Japan 5 4.00 4.00 9% 4.00 0.39 5.00 0.49
Kaze no Stigma 6 3.17 2.72 14% 2.72 0.38 3.38 0.48
Meitantei Conan 6 3.20 2.71 14% 2.71 0.38 3.22 0.45
.hack//Liminality 6 3.00 2.65 14% 2.65 0.37 3.15 0.44
Hellsing 5 3.87 3.66 9% 3.66 0.36 5.72 0.56
Chikyu Shojo Arjuna 5 3.83 3.65 9% 3.65 0.36 4.57 0.45
Maria-sama ga Miteru 4th 6 3.00 3.00 14% 2.50 0.35 3.00 0.42
Persona 4: The Animation 6 3.00 2.50 14% 2.50 0.35 2.43 0.34
Narutaru ~Mukuro naru hoshi Tama taru ko~ 6 3.00 3.00 14% 2.50 0.35 3.86 0.54
Shinrei Tantei Yakumo 6 3.00 3.00 14% 2.50 0.35 3.00 0.42
Amaenaideyo!! Katsu!! 6 3.00 2.50 14% 2.50 0.35 2.43 0.34
.hack//SIGN 6 3.00 2.49 14% 2.49 0.35 4.27 0.60
Angel Beats! 6 2.91 2.46 14% 2.46 0.35 3.50 0.49
Sonny Boy 5 4.00 4.00 9% 3.50 0.34 4.00 0.39

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