Here's my favorite senshi and why, from most favorite to least favorite.

Tsukino Usagi/ Sailor Moon

She's funny, friendly, gorgeous, and royalty...what isn't to like about her? She's also the leader of the Sailor Senshi, which she handles well, and she gets all the cute guys ^_^

Hino Rei/ Sailor Mars

Rei isn't so bad at all...most people think she's mean to Usagi, but that simply isn't true. Rei is a Shinto priestess (which is really cool and adds a unique facet to BSSM) and has a relationship with Yuuichiro, a neat guy (too bad it doesn't really blossom into anything).

Seiya Kou/ Sailor Starfighter

I may like this character better as Seiya, as he's much kinder and has a crush on our Usagi, but Sailor Starfighter is also pretty neat in my opinion.

Aino Minako/ Sailor Venus

A lot like Usagi in many different ways, she's sort of scatterbrained at times, and a bit boy-crazy, even more so than "Mako of the Old Sempai".

Tomoe Hotaru/ Sailor Saturn

I didn't like her that much until I learned some more about her...now she's one of my favorite senshi. It's heartbreaking how badly she's treated :(

Chibiusa/ Sailor Chibimoon

Everyone seems to dislike her, but I don't know why...she's just a normal, sometimes-bratty little girl. She's also cute as a button, which makes me like her even more.

Kino Makoto/ Sailor Jupiter

Loyal to a fault; the show doesn't really go much into the depths of her character, except for her old sempai. She's physically strong, and an all-around nice person.

Yaten Kou/ Sailor Starhealer

Well, he certainly can be a jerk (especially to Minako), but he's cute, funny, and all in all, an interesting character.

Mizuno Ami/ Sailor Mercury

Boring, boring, boring. Almost as boring as Taiki. I like her a little bit, though.

Meiou Setsuna/ Sailor Pluto

Again, I don't like the Outers as much as the Inners, but Setsuna seems to be okay, although she's rather mysterious.

Taiki Kou/ Sailor Starmaker

Boring, tall, not really good-looking....sigh, poor Taiki...he doesn't have as much of a personality as the other Lights--cute Seiya the leader and cute Yaten the funny jerk.

Kaiou Michiru/ Sailor Neptune

I hate Michiru...I really do...she flirts with Seiya (who's Usagi's, kind of), she's selfish, mean, and snobbish... (sorry to people who like her). Her good point though, is that she's absolutely beautiful.

Ten'ou Haruka/ Sailor Uranus

Mean...much meaner than Michiru, expecially towards Usagi. Kind of cold, and determined in her attitudes...