Preferred the stock UI of Kbin, then I found out about userstyles and am in love with them. I'm a big fan of the microblogging, as it's a place for posts that don't warrant a full thread, but can still spark discussion. The politics of the Lemmy devs disgust me, so I'd rather not use a site using their software. Public upvotes/downvotes are great IMO, lets things be more transparent (like for instance I upvote all my posts, without it being public no one would know), plus it helps catch fake votes.
I also just find the name Kbin to be more catchy than Lemmy. Like GabeN, or k than.