I wish I were doing more remixing right now. I'm feeling some nostalgia for it right now---weird because I think nostalgia was the reason most of us started it in the first place. So I'm in a weird meta-nostalgia place right now.
But I'm not a fast remixer. I'm slow and obsessive and it doesn't fit into my busy schedule these days.
I do hold arranging in high regard, as far as its creative merits go. I think it's a very strong relationship between the arranger and the listener. You're working with something that's usually already baked into the listener's memory, so you're starting with a strong common core of experience with the audience. You've already bonded with the listener over your love of the tune, but more importantly your creative decisions to alter the original material stand out strongly. The listener has greater vision into your creative process than if they were listening to your original material. Furthermore, the listener has an equally enhanced relationship to other listeners, given the shared histories listeners probably have with the tunes.
Of course, original material has different strengths. But I do think arranging has objectively unique strengths too.