I was surprised at how hard it was to find a slider plugin as customizable as this one. I needed one thing - a wordpress slideshow plugin that would do text-only slides. Something that could do in wordpress what I'd been able to do with a plain ol' website and jquery cycle. And man, does it deliver.
I love that you can have several different slideshows, with custom CSS for each one. I love that you can put HTML in the text slides (a limited set of tags, but it's enough). I love that it's incredibly easy to put in posts/pages, widgets, and templates alike. And the support forum is regularly tended, which is definitely awesome.
Definitely my favorite slider plugin.