When I first discovered Soul Eater quite a while back, the first thing I thought of was "Wow, this looks almost like something that would come out of Tim Burton's mind!". What with the character designs and all. I fell in love with it right from there. But that was only the beginning~ All of the characters have their own thing; there are Weapon Meisters such as Maka Albarn, Death the Kid, and Black Star -just to name a few- as well as the Weapons themselves such as Soul Eater Evans, Liz and Patty Thompson, and Tsubaki. Even those who can be both in a sense like Dr. Stein. The students attend a school created by Shingami-Sama where they work on improving their skills in hopes of one day becoming the new weapon wielded by Shinigami-Sama / becoming a Death Scythe (the ultimate weapon). However in order to become a Death Scythe you must first obtain ninety-nine evil souls plus one more from that of a witch -- It's not as easy as it sounds either, especially when you have to deal with some pretty nasty witches and their friends on top of that..
** Spoiler Alert!!! click to hide or show**
Oh yeah, one more thing, they have to do their best to not succumb to the insanity that's been spreading thanks to that wonderful Kishin.
Anyway, overall the character development throughout the series is quite unique as well as the characters themselves.
** Spoiler Alert!!! click to hide or show**
(It's also fun to notice the resemblances in some of the names in the series, such as Al Capone (famous gangster), Lupin (thief), etc.)
To top it all off, not only the open/ending themes were good, but the music throughout the series is original; containing all sorts of different tastes to please just about everyone. It ranges from moderately soft instrumentals to upbeat almost techno sounding tunes heading towards a little bit of rap and all the way to some pretty awesome rock sounds. Yeah, just about everything.
Hope that got you interested~