Well I'm going to be honest. I don't have a whole lot I can add to this. I am a man of few words. Its hard for me to get my true thoughts and feelings portrayed accurately sometimes. I have pretty bad social-anxiety, and just anxiety in general, as well as sever ADD, and though I was never diagnosed with OCD, I feel like I am with certain things. I don't struggle with or have mental Illness, though I have a few family members who had had it. I am also only in Highschool and lack confidence when it comes to words. But I just wanted to say that I love Shallans character. I personally kind of enjoy her jokes, even when they become a little too much. I'm not saying that I love her character more than say Kaladins or Dalinars, But she is among my favorites. Dalininar is actually my favorite SA character. He was masterly put together in OB. OB was the book that made The SA my Favorite series ever.(Mistborn a close 2nd). But Shallan though...she's awesome. I don't think she deserves all this criticism. The only problem I had with Shallan was in WoK. I still liked and and found her chapters neccesary but I did find myself longing to get back to Kaladin, and to continue reading about how Bridge Four came to be. And Bridge Four is just about my favorite thing from any & all of Brandon's books. I love the Humor, unity, love, and kinship that is Bridge Four.
Anyway, sorry for getting tangled in other topics when this is about Shallan. I guess my main point in all of this is that I love Shallan. Shallans awesome and a great character, and anyone who says otherwise will...um...I dunno. Did I mention I'm slow with with words?
Anyways. I am Pro-Shallan!
ps: People were mentioning addiction earlier, and I jus want to say that I love Teft. Seeing him striving to overcome his self-pity and self-loathing caused by his addiction, and learning that it is possible to love himself again was very tender and inspirational. I also love the role of the spren in helping their broken companions overcome their problems and become whole. Phendorana and Sylphrena are stellar examples of this. I think this shows that when struggling with an addiction or some form of mental illness (or any of the other problems mentioned), that it is 100% necessary and essential to have support from loved ones.
pps: Sorry again for not staying completely on topic! When I do manage to get my thoughts down its not always as organized and smooth flowing as I would like.
ppps: I just want to applaud what @Jash said at the very top. (2nd comment)