Magical Girls are so lovable I don't know what's harder, picking five favorites, or picking any least favorites. I'm gonna leave the megucas out of this one since they'd not only dominate all five slots, but I wouldn't know what order to put them in.

Favorites

1 ) Sakura Kinomoto (Cardcaptor Sakura)

2 ) Gretel (Otogi-Jushi Akazukin)

3 ) Yuri Tsukikage (Heartcatch Precure)

4 ) Akazukin (Otogi-Jush Akazukin)

5 ) Miyuki Hoshizora (Smile Precure)


Least Favorites

1 ) Madoka Aguri (Doki Doki Precure)

2 ) Mana Aida (Doki Doki Precure)

3 ) Miki Aono (Fresh Precure)

4 ) Utau Hoshina (Shugo Chara)

5 ) Nanoha Takamachi (Lyrical Nanoha)

Favorites:

1. Ami Mizuno (Sailor Moon)
2. Sayaka Miki (PMMM)
3. Fuu Hououji (Magic Knight Rayearth)
4. Makoto Kino (Sailor Moon)
5. Yuri Tsukikage (Heartcatch Precure)

I don't have a least favorite list...

Least Favorite:
Sailor Neptune. Just never liked her.

Favorite:
Creamy Mami/Yuu Morisawa
Sailor Jupiter/Makoto Kino
Princess Tutu/Ahiru
Sae Sawanoguchi (Magic User's Club)
Cure Marine/Erika Kurumi 
-OR- 
Utena Tenjou (depending on your stance on if Utena's a magical girl)

Least Favorite:
Hanon (Mermaid Melody)
Yuri or Hinagiku (Wedding Peach)
the entire cast of Cyber-team in Akihabara
Ichika (Uta~Kata)
Madoka Aguri/Cure Ace

Working my list!

Least favorite:
Sailor Neptune
Cure Marine
Sailor Chibi Moon
PGSM Sailor Venus

Favorite:
Sailor Venus/Sailor V
Shugo Chara: Amu
CCS: Sakura
Ojamjo Doremi: Momoko

I'm short. I really need to watch more series. XD

Mew Ami wrote:

Least Favorite:
Sailor Neptune. Just never liked her.

As of completing the manga I must add at least Uranus to the list. Neptune was the less of the two, but Uranus spent most of her role in the manga being rude, hostile, cynical and obstructive. Kissing Usagi without her consent is also not good.

I'm just glad that one plotline from the Stars section of the anime never happened.

Spoiler:

Actually according to fans Neptune and Uranus were worst in the anime. I beg to different on that opinion. >.>

Favourite:

1. Homura Akemi (PMMM)
2. Sakura Kinomoto (Cardcaptor Sakura)
3. Tsubomi Hanasaki/Cure Blossom (Heartcatch Precure)
4. Yayoi Kise/Cure Peace (Smile Precure)
5. Miyuki Hoshizora/Cure Happy (Smile Precure)

The only Magical Girl I've outright disliked is Aguri Madoka/Cure Ace from DokiDoki Precure.

Favorites
1. Usagi Tsukino/Sailor Moon (Sailor Moon obviously)
2. Ichigo Momomiya (Tokyo Mew Mew)
3. Utena Tenjou (kind of a magical girl, and I haven't finished Revolutionary Girl Utena, but from what I've seen I love her character)
4. Umi (who's last name escapes me, from Magic Knight Rayearth)
5. Ami Mizuno/Sailor Mercury (Sailor Moon)

favourites:
1. sailor moon
2. sailor venus/ sailor mercury and sailor saturn( these three share this spot)
3. sailor jupiter
4.Nanoha
5.wedding peach

Alos, if I had to pick leats favorites, it would be Hotaru Tomoe/Sailor Saturn from Sailor Moon and Zakuro from Tokyo Mew Mew. It's not that I hate Hotaru, she's just not my favorite. And Zakuro is REALLY boring, inthe manga at least.

This is SO hard!

My favourites are

1. Sayaka Miki (Puella Magi Madoka Magica)
2. Cure Peach/Love Momozono (Fresh PreCure)
3. Cure Lovely/Megumi Aino (HappinessCharge PreCure)
4. Mew Ichigo/Ichigo Momomiya (Tokyo Mew Mew)
5. Sailor Moon/Usagi Tsukino (Sailor Moon)

I have a few other favourites, but these are definitely my Top 5. I think they're in that order, too!

As for least favourites... 

1. Sailor Uranus/Haruka Tenou (Sailor Moon)
2. Milky Rose/Milk/Kurumi Mimino (Yes! PreCure 5)
3. Cure Rouge/Rin Natsuki (Yes! PreCure 5)
4. Cure Blossom/Tsubomi Hanasaki (HeartCatch PreCure)
5. Cure Moonlight/Yuri Tsukikage (HeartCatch PreCure)

It's not that i don't like these characters... they're all different, but I don't feel attached to them and I can't relate to them xx

My Top 5 Favorite Magical Girls are:

1. Rei Hino/Sailor Mars (Sailor Moon)

2. Yuri Tanima/Angel Lily (Wedding Peach)

3. Momoko Hanasaki/Wedding Peach/Angel Peach (Wedding Peach)

4. Hotaru Tomoe/Sailor Saturn (Sailor Moon)

5. Setsuna Meioh/Sailor Pluto (Sailor Moon)


Honorable Mentions: 

. Makoto Kino/Sailor Jupiter (Sailor Moon)

. Ami Mizuno/Sailor Mercury (Sailor Moon)


As for my least favorites I don't have any least favorites. So I'm only listing my favorites.