I recently noticed that my preference has changed over the years.
Back when I first started to read the comics, I ADORED Hay Lin! She was my absolute favorite! Will was also pretty cool since she had the Heart of Kandrakar.

Meanwhile I suddenly noticed that I've grown very fond of Taranee. While her character is comparably flat in the first arcs, she gains a lot of depth in the later half of the comics.

During my research I also realized that Cornelia was the one of the five girls I knew the least about. While I can easily tell you what Irma's traits, Tara's hobbies, Hay Lin's love interests or Will's bad habits are, it's a lot more difficult to say something about Cornelia. I know about her family and love interests but somehow she feels harder to grasp when it comes to her personality or the things she likes or dislikes.

I also always liked Orube. While she's kind of annoying (I think that was intended) when she first takes over Taranee's spot in the team, she becomes a valuable asset and helps Will grow in her role as the leader. She also becomes more interesting as the story progresses.

Elyon of cause was a cool swing with the whole "You're actually a princess of a foreign magical country" thing. However I never liked how quickly she returned good and was forgiven by everyone. It seemed strange to me.

Any other people to mention? Oh, yeah! I like Vatek and Kandor a lot. Those two are actually a little similar to me.