It's not quite a three-way tie any more; I decided to change my vote to Fire and Marble. (Although, as I said in my previous post, it is *so* hard to decide, I would vote for all five if I could!) I'm surprised there's so little love for the Fire style -- I find it makes for great atmospheric levels (especially if you use a lot of flamethrowers!) and, like Marble, it has the mixture of straight-edged and rocky terrain pieces giving you a lot of choice in your level design.