Do I have to explain if my stance changed? Probably not. But perhaps there is a thing to be kept in mind.
First of all, I dislike vampire girls who are portrayed more like devil girls (you know the tail, wings and the cat tooth. I am not much into that "cute" and "moe" stuff. I actually dislike Remilia or any touhou girl being portrayed cute. Personally, I don't find anything cute about a youkai, vampire, spirit who eat, kill and harass humans. But yea, that is my personal opinion.
I never seen any fan images of Remilia when I got in touch with Touhou. Even more, I never played EoSD in my life. I did see her portrait of course in IN many times, and had to forcefully use her to unlock stuff. Her portraits already charmed me a bit and her dialogue as well. That bitchy, childish, egoistic face she had. Anyway, after I beaten IN on normal, I simply did a youtube search for other Touhou final bosses. When I saw that Remilia was actually the final boss I was surprised and after I listened to her theme song I was struck.
Ok so that is more like how she became my favourite, but why is she still my favourite? Lately due to many fan art and PMiSS reading, some girls started catching my attention. Interesting and amusing Touhou girls such as: Keine, Eiki, Suika, Chen, Youmu, Reimu etc. To be honest, most of them actually have bad-ass art and appearance. This is what I am weak against: Bad-ass appearance with full glory. The reason why I am neutral against characters like Suwako, Komeiji, Utsuho, and such is because they have not the same "feel" to me as Yugi, Suika etc would have. Heck, even Reisen has far more bad-ass pictures than the Komeijis. Utsuho is only portrayed bad-ass because of her powers. That is more like based on her power, instead of her personality. Same goes for Suwako, her hat is what attracts people. Aside from that nothing.
I have seen some bad-ass/awesome appearances of Eiki-sama, Suika, Ex-Keine or Yukari for example. They could easy become a favourite, but yet Remilia has that one special thing that makes her attractive, not to mention her soothing theme song. Maybe it is the charisma after all. Yea, it must be it. Or was it fate?
Oh my, I typed way too much again. Basically, it didn't change. And it won't for a long time probably.