Hi,
I've always liked passive filters. There was just something so natural about them that you could not find in active filters, and they dont need a power supply which is very interesting in itself. Imagine getting the response you need with just passive components alone, how cool is that.
There's a lot of different topologies though so you really have to think about what your application really needs; what it can get by with without getting too complicated with too many parts.
I wish i could say more right now, but i'd have to see the application first.