Just curious if people choose one half of the town more then the other.

From reading post's I now not everyone has played Shivering isles, and some may choose to avoid this quest for roleplay reasons.

My first character did this quest (before I roleplayed more), and killed the Demented half of the town.

When she returned to Cyrodiil, I believe this quest also triggered a visit from Lucien Lachance. Which as I was new to Elder Scrolls and had avoided looking on the internet for spoliers was quite a shock.