Do people actually like all of the overdesigned clutter to the point where it makes them not want to switch sites?
To me, the stripped down clarity on Lemmy is a feature. I remember back in the day when people flocked to Facebook from MySpace, in large part because they were sick of eye gouging customized pages and just wanted a simple, consistent interface. The content, not the buttons to click on it are the draw right?
Personally I like the custom CSS each subreddit could apply but to each their own I guess.
Yep, I usually turn it off, but for particularly inspired ones I like to leave it on, like the reddit sub (mildlyinfuriating I think?) where the text is slightly crooked and there is a hair in the background.